165663302335640 has 64 divisors (see below), whose sum is σ = 399010630176000. Its totient is φ = 61713644100480.

The previous prime is 165663302335639. The next prime is 165663302335703. The reversal of 165663302335640 is 46533203366561.

It is a congruent number.

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, 1847226596 + ... + 1847316275.

It is an arithmetic number, because the mean of its divisors is an integer number (6234541096500).

Almost surely, 2^{165663302335640} is an apocalyptic number.

165663302335640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165663302335640 is an abundant number, since it is smaller than the sum of its proper divisors (233347327840360).

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

165663302335640 is a wasteful number, since it uses less digits than its factorization.

165663302335640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3694542960 (or 3694542956 counting only the distinct ones).

The product of its (nonzero) digits is 20995200, while the sum is 53.

The spelling of 165663302335640 in words is "one hundred sixty-five trillion, six hundred sixty-three billion, three hundred two million, three hundred thirty-five thousand, six hundred forty".