165800070557 has 64 divisors (see below), whose sum is σ = 195679411200. Its totient is φ = 140062824000.

The previous prime is 165800070547. The next prime is 165800070571. The reversal of 165800070557 is 755070008561.

It is not a de Polignac number, because 165800070557 - 2⁸ = 165800070301 is a prime.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165800070547) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 355032038 + ... + 355032504.

It is an arithmetic number, because the mean of its divisors is an integer number (3057490800).

Almost surely, 2^165800070557 is an apocalyptic number.

It is an amenable number.

165800070557 is a deficient number, since it is larger than the sum of its proper divisors (29879340643).

165800070557 is a wasteful number, since it uses less digits than its factorization.

165800070557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759 (or 737 counting only the distinct ones).

The product of its (nonzero) digits is 294000, while the sum is 44.

The spelling of 165800070557 in words is "one hundred sixty-five billion, eight hundred million, seventy thousand, five hundred fifty-seven".