664013260 has 12 divisors (see below), whose sum is σ = 1394427888. Its totient is φ = 265605296.

The previous prime is 664013257. The next prime is 664013269. The reversal of 664013260 is 62310466.

It is not an unprimeable number, because it can be changed into a prime (664013269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16600312 + ... + 16600351.

It is an arithmetic number, because the mean of its divisors is an integer number (116202324).

Almost surely, 2^664013260 is an apocalyptic number.

It is an amenable number.

664013260 is an abundant number, since it is smaller than the sum of its proper divisors (730414628).

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

664013260 is a wasteful number, since it uses less digits than its factorization.

664013260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33200672 (or 33200670 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 664013260 is about 25768.4547460650. The cubic root of 664013260 is about 872.4199415874.

It can be divided in two parts, 6640 and 13260, that added together give a triangular number (19900 = T₁₉₉).

The spelling of 664013260 in words is "six hundred sixty-four million, thirteen thousand, two hundred sixty".