1666022120 has 32 divisors (see below), whose sum is σ = 4284057600. Its totient is φ = 571207488.

The previous prime is 1666022107. The next prime is 1666022123. The reversal of 1666022120 is 212206661.

It is a self number, because there is not a number n which added to its sum of digits gives 1666022120.

It is not an unprimeable number, because it can be changed into a prime (1666022123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2974760 + ... + 2975319.

It is an arithmetic number, because the mean of its divisors is an integer number (133876800).

Almost surely, 2^1666022120 is an apocalyptic number.

1666022120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1666022120 is an abundant number, since it is smaller than the sum of its proper divisors (2618035480).

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

1666022120 is a wasteful number, since it uses less digits than its factorization.

1666022120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5950097 (or 5950093 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 1666022120 is about 40816.9342307822. The cubic root of 1666022120 is about 1185.4782428752.

Adding to 1666022120 its reverse (212206661), we get a palindrome (1878228781).

The spelling of 1666022120 in words is "one billion, six hundred sixty-six million, twenty-two thousand, one hundred twenty".