665566264 has 32 divisors (see below), whose sum is σ = 1366729200. Its totient is φ = 301342720.

The previous prime is 665566261. The next prime is 665566267. The reversal of 665566264 is 462665566.

It is an interprime number because it is at equal distance from previous prime (665566261) and next prime (665566267).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665566261) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 7902 + ... + 37330.

Almost surely, 2^665566264 is an apocalyptic number.

It is an amenable number.

665566264 is an abundant number, since it is smaller than the sum of its proper divisors (701162936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665566264 is a wasteful number, since it uses less digits than its factorization.

665566264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29703 (or 29699 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 46.

The square root of 665566264 is about 25798.5709681757. The cubic root of 665566264 is about 873.0995549055.

The spelling of 665566264 in words is "six hundred sixty-five million, five hundred sixty-six thousand, two hundred sixty-four".