664232160 has 96 divisors (see below), whose sum is σ = 2215436832. Its totient is φ = 166707200.

The previous prime is 664232159. The next prime is 664232161. The reversal of 664232160 is 61232466.

It is an interprime number because it is at equal distance from previous prime (664232159) and next prime (664232161).

It is a tau number, because it is divible by the number of its divisors (96).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664232161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32541 + ... + 48860.

It is an arithmetic number, because the mean of its divisors is an integer number (23077467).

Almost surely, 2^664232160 is an apocalyptic number.

664232160 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

664232160 is an abundant number, since it is smaller than the sum of its proper divisors (1551204672).

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

664232160 is a wasteful number, since it uses less digits than its factorization.

664232160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81436 (or 81428 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 664232160 is about 25772.7018374093. The cubic root of 664232160 is about 872.5157989821.

The spelling of 664232160 in words is "six hundred sixty-four million, two hundred thirty-two thousand, one hundred sixty".