1666066350 has 96 divisors (see below), whose sum is σ = 4489650144. Its totient is φ = 406425600.

The previous prime is 1666066349. The next prime is 1666066373. The reversal of 1666066350 is 536606661.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 1666066299 and 1666066308.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 216570 + ... + 224130.

It is an arithmetic number, because the mean of its divisors is an integer number (46767189).

Almost surely, 2^1666066350 is an apocalyptic number.

1666066350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1666066350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2244825072).

1666066350 is an abundant number, since it is smaller than the sum of its proper divisors (2823583794).

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

1666066350 is a wasteful number, since it uses less digits than its factorization.

1666066350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7702 (or 7697 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 39.

The square root of 1666066350 is about 40817.4760366194. The cubic root of 1666066350 is about 1185.4887335800.

The spelling of 1666066350 in words is "one billion, six hundred sixty-six million, sixty-six thousand, three hundred fifty".