1666601112 has 128 divisors (see below), whose sum is σ = 4875552000. Its totient is φ = 469347840.

The previous prime is 1666601107. The next prime is 1666601117. The reversal of 1666601112 is 2111066661.

It is an interprime number because it is at equal distance from previous prime (1666601107) and next prime (1666601117).

It is a self number, because there is not a number n which added to its sum of digits gives 1666601112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666601117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 262714 + ... + 268982.

It is an arithmetic number, because the mean of its divisors is an integer number (38090250).

Almost surely, 2^1666601112 is an apocalyptic number.

1666601112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1666601112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2437776000).

1666601112 is an abundant number, since it is smaller than the sum of its proper divisors (3208950888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1666601112 is a wasteful number, since it uses less digits than its factorization.

1666601112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6361 (or 6357 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 1666601112 is about 40824.0261610733. The cubic root of 1666601112 is about 1185.6155565625.

Adding to 1666601112 its reverse (2111066661), we get a palindrome (3777667773).

The spelling of 1666601112 in words is "one billion, six hundred sixty-six million, six hundred one thousand, one hundred twelve".