166501365002265 has 32 divisors (see below), whose sum is σ = 266797412392320. Its totient is φ = 88668990265856.

The previous prime is 166501365002239. The next prime is 166501365002309. The reversal of 166501365002265 is 562200563105661.

It is a cyclic number.

It is not a de Polignac number, because 166501365002265 - 2⁸ = 166501365002009 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 663678871 + ... + 663929699.

It is an arithmetic number, because the mean of its divisors is an integer number (8337419137260).

Almost surely, 2^{166501365002265} is an apocalyptic number.

166501365002265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166501365002265 is a deficient number, since it is larger than the sum of its proper divisors (100296047390055).

166501365002265 is a wasteful number, since it uses less digits than its factorization.

166501365002265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316313.

The product of its (nonzero) digits is 1944000, while the sum is 48.

The spelling of 166501365002265 in words is "one hundred sixty-six trillion, five hundred one billion, three hundred sixty-five million, two thousand, two hundred sixty-five".