265012665 has 16 divisors (see below), whose sum is σ = 446337600. Its totient is φ = 133900992.

The previous prime is 265012651. The next prime is 265012669. The reversal of 265012665 is 566210562.

It is a happy number.

It is not a de Polignac number, because 265012665 - 2¹⁰ = 265011641 is a prime.

It is a super-2 number, since 2×265012665² = 140463425220804450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (265012669) 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, 464650 + ... + 465219.

It is an arithmetic number, because the mean of its divisors is an integer number (27896100).

Almost surely, 2^265012665 is an apocalyptic number.

It is an amenable number.

265012665 is a deficient number, since it is larger than the sum of its proper divisors (181324935).

265012665 is a wasteful number, since it uses less digits than its factorization.

265012665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 929896.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 265012665 is about 16279.2095938347. The cubic root of 265012665 is about 642.3260613095.

The spelling of 265012665 in words is "two hundred sixty-five million, twelve thousand, six hundred sixty-five".