165975996080 has 80 divisors (see below), whose sum is σ = 389328206400. Its totient is φ = 65801911296.

The previous prime is 165975996029. The next prime is 165975996097. The reversal of 165975996080 is 80699579561.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 165975995998 and 165975996016.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4644842 + ... + 4680438.

It is an arithmetic number, because the mean of its divisors is an integer number (4866602580).

Almost surely, 2^165975996080 is an apocalyptic number.

165975996080 is a gapful number since it is divisible by the number (10) 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 165975996080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194664103200).

165975996080 is an abundant number, since it is smaller than the sum of its proper divisors (223352210320).

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

165975996080 is a wasteful number, since it uses less digits than its factorization.

165975996080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36126 (or 36120 counting only the distinct ones).

The product of its (nonzero) digits is 36741600, while the sum is 65.

The spelling of 165975996080 in words is "one hundred sixty-five billion, nine hundred seventy-five million, nine hundred ninety-six thousand, eighty".