265661297 has 16 divisors (see below), whose sum is σ = 292913280. Its totient is φ = 238944000.

The previous prime is 265661273. The next prime is 265661299. The reversal of 265661297 is 792166562.

It is a cyclic number.

It is not a de Polignac number, because 265661297 - 2¹² = 265657201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (265661299) 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, 662297 + ... + 662697.

It is an arithmetic number, because the mean of its divisors is an integer number (18307080).

Almost surely, 2^265661297 is an apocalyptic number.

It is an amenable number.

265661297 is a deficient number, since it is larger than the sum of its proper divisors (27251983).

265661297 is a wasteful number, since it uses less digits than its factorization.

265661297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904.

The product of its digits is 272160, while the sum is 44.

The square root of 265661297 is about 16299.1195160966. The cubic root of 265661297 is about 642.8496762707.

The spelling of 265661297 in words is "two hundred sixty-five million, six hundred sixty-one thousand, two hundred ninety-seven".