664463260 has 12 divisors (see below), whose sum is σ = 1395372888. Its totient is φ = 265785296.

The previous prime is 664463257. The next prime is 664463263. The reversal of 664463260 is 62364466.

It is an interprime number because it is at equal distance from previous prime (664463257) and next prime (664463263).

It is a super-2 number, since 2×664463260² = 883022847779655200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664463263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16611562 + ... + 16611601.

It is an arithmetic number, because the mean of its divisors is an integer number (116281074).

Almost surely, 2^664463260 is an apocalyptic number.

It is an amenable number.

664463260 is an abundant number, since it is smaller than the sum of its proper divisors (730909628).

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

664463260 is a wasteful number, since it uses less digits than its factorization.

664463260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33223172 (or 33223170 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 37.

The square root of 664463260 is about 25777.1848734496. The cubic root of 664463260 is about 872.6169759667.

The spelling of 664463260 in words is "six hundred sixty-four million, four hundred sixty-three thousand, two hundred sixty".