265633664 has 16 divisors (see below), whose sum is σ = 529192320. Its totient is φ = 132816768.

The previous prime is 265633651. The next prime is 265633691. The reversal of 265633664 is 466336562.

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-2 number, since 2×265633664² = 141122486900129792, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1037504 + ... + 1037759.

It is an arithmetic number, because the mean of its divisors is an integer number (33074520).

Almost surely, 2^265633664 is an apocalyptic number.

It is an amenable number.

265633664 is a deficient number, since it is larger than the sum of its proper divisors (263558656).

265633664 is an equidigital number, since it uses as much as digits as its factorization.

265633664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2075277 (or 2075265 counting only the distinct ones).

The product of its digits is 466560, while the sum is 41.

The square root of 265633664 is about 16298.2718102258. The cubic root of 265633664 is about 642.8273866344.

The spelling of 265633664 in words is "two hundred sixty-five million, six hundred thirty-three thousand, six hundred sixty-four".