265656506 has 4 divisors (see below), whose sum is σ = 398484762. Its totient is φ = 132828252.

The previous prime is 265656491. The next prime is 265656529. The reversal of 265656506 is 605656562.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 171741025 + 93915481 = 13105^2 + 9691^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66414125 + ... + 66414128.

Almost surely, 2^265656506 is an apocalyptic number.

265656506 is a deficient number, since it is larger than the sum of its proper divisors (132828256).

265656506 is a wasteful number, since it uses less digits than its factorization.

265656506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132828255.

The product of its (nonzero) digits is 324000, while the sum is 41.

The square root of 265656506 is about 16298.9725443047. The cubic root of 265656506 is about 642.8458118120.

The spelling of 265656506 in words is "two hundred sixty-five million, six hundred fifty-six thousand, five hundred six".