660722160 has 80 divisors (see below), whose sum is σ = 2340850176. Its totient is φ = 151021824.

The previous prime is 660722143. The next prime is 660722191. The reversal of 660722160 is 61227066.

660722160 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

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

It is a congruent number.

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, 194964 + ... + 198323.

Almost surely, 2^660722160 is an apocalyptic number.

660722160 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

660722160 is an abundant number, since it is smaller than the sum of its proper divisors (1680128016).

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

660722160 is a wasteful number, since it uses less digits than its factorization.

660722160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393310 (or 393304 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 660722160 is about 25704.5163346833. The cubic root of 660722160 is about 870.9762063658.

The spelling of 660722160 in words is "six hundred sixty million, seven hundred twenty-two thousand, one hundred sixty".