265166001 has 16 divisors (see below), whose sum is σ = 399499200. Its totient is φ = 173780064.

The previous prime is 265165997. The next prime is 265166047. The reversal of 265166001 is 100661562.

It is a happy number.

265166001 is a `hidden beast` number, since 2 + 6 + 51 + 6 + 600 + 1 = 666.

It is not a de Polignac number, because 265166001 - 2² = 265165997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (265166081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81636 + ... + 84821.

It is an arithmetic number, because the mean of its divisors is an integer number (24968700).

Almost surely, 2^265166001 is an apocalyptic number.

It is an amenable number.

265166001 is a deficient number, since it is larger than the sum of its proper divisors (134333199).

265166001 is a wasteful number, since it uses less digits than its factorization.

265166001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166525 (or 166519 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 265166001 is about 16283.9184780568. The cubic root of 265166001 is about 642.4499204458.

The spelling of 265166001 in words is "two hundred sixty-five million, one hundred sixty-six thousand, one".