664653360 has 80 divisors (see below), whose sum is σ = 2354777856. Its totient is φ = 151920384.

The previous prime is 664653343. The next prime is 664653373. The reversal of 664653360 is 63356466.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 196134 + ... + 199493.

Almost surely, 2^664653360 is an apocalyptic number.

664653360 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

664653360 is an abundant number, since it is smaller than the sum of its proper divisors (1690124496).

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

664653360 is a wasteful number, since it uses less digits than its factorization.

664653360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395650 (or 395644 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 39.

The square root of 664653360 is about 25780.8719790468. The cubic root of 664653360 is about 872.7001853177.

It can be divided in two parts, 6646 and 53360, that added together give a palindrome (60006).

The spelling of 664653360 in words is "six hundred sixty-four million, six hundred fifty-three thousand, three hundred sixty".