165065599590 has 16 divisors (see below), whose sum is σ = 396157439088. Its totient is φ = 44017493216.

The previous prime is 165065599571. The next prime is 165065599619. The reversal of 165065599590 is 95995560561.

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, 2751093297 + ... + 2751093356.

It is an arithmetic number, because the mean of its divisors is an integer number (24759839943).

Almost surely, 2^165065599590 is an apocalyptic number.

165065599590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165065599590 is an abundant number, since it is smaller than the sum of its proper divisors (231091839498).

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

165065599590 is a wasteful number, since it uses less digits than its factorization.

165065599590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5502186663.

The product of its (nonzero) digits is 16402500, while the sum is 60.

The spelling of 165065599590 in words is "one hundred sixty-five billion, sixty-five million, five hundred ninety-nine thousand, five hundred ninety".