664315140 has 48 divisors (see below), whose sum is σ = 1865324160. Its totient is φ = 176651520.

The previous prime is 664315129. The next prime is 664315153. The reversal of 664315140 is 41513466.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 664315098 and 664315107.

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, 6120 + ... + 36960.

It is an arithmetic number, because the mean of its divisors is an integer number (38860920).

Almost surely, 2^664315140 is an apocalyptic number.

664315140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

664315140 is an abundant number, since it is smaller than the sum of its proper divisors (1201009020).

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

664315140 is a wasteful number, since it uses less digits than its factorization.

664315140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31212 (or 31210 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 664315140 is about 25774.3116299931. The cubic root of 664315140 is about 872.5521308304.

The spelling of 664315140 in words is "six hundred sixty-four million, three hundred fifteen thousand, one hundred forty".