660705120 has 96 divisors (see below), whose sum is σ = 2312483040. Its totient is φ = 176186880.

The previous prime is 660705113. The next prime is 660705151. The reversal of 660705120 is 21507066.

660705120 is a `hidden beast` number, since 6 + 607 + 0 + 51 + 2 + 0 = 666.

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

It is a super-3 number, since 3×660705120³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 72151 + ... + 80790.

It is an arithmetic number, because the mean of its divisors is an integer number (24088365).

Almost surely, 2^660705120 is an apocalyptic number.

660705120 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

660705120 is an abundant number, since it is smaller than the sum of its proper divisors (1651777920).

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

660705120 is a wasteful number, since it uses less digits than its factorization.

660705120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152965 (or 152951 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 660705120 is about 25704.1848732847. The cubic root of 660705120 is about 870.9687188201.

The spelling of 660705120 in words is "six hundred sixty million, seven hundred five thousand, one hundred twenty".