165664396760 has 32 divisors (see below), whose sum is σ = 372756662640. Its totient is φ = 66263666304.

The previous prime is 165664396741. The next prime is 165664396771. The reversal of 165664396760 is 67693466561.

It is a self number, because there is not a number n which added to its sum of digits gives 165664396760.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2114039 + ... + 2191001.

Almost surely, 2^165664396760 is an apocalyptic number.

165664396760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165664396760 is an abundant number, since it is smaller than the sum of its proper divisors (207092265880).

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

165664396760 is a wasteful number, since it uses less digits than its factorization.

165664396760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130787 (or 130783 counting only the distinct ones).

The product of its (nonzero) digits is 29393280, while the sum is 59.

The spelling of 165664396760 in words is "one hundred sixty-five billion, six hundred sixty-four million, three hundred ninety-six thousand, seven hundred sixty".