660529997928 has 96 divisors (see below), whose sum is σ = 1871939946240. Its totient is φ = 210155316480.

The previous prime is 660529997807. The next prime is 660529997947. The reversal of 660529997928 is 829799925066.

660529997928 is a `hidden beast` number, since 6 + 6 + 0 + 529 + 9 + 9 + 7 + 92 + 8 = 666.

660529997928 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1864026 + ... + 2189897.

It is an arithmetic number, because the mean of its divisors is an integer number (19499374440).

Almost surely, 2^660529997928 is an apocalyptic number.

It is an amenable number.

660529997928 is an abundant number, since it is smaller than the sum of its proper divisors (1211409948312).

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

660529997928 is a wasteful number, since it uses less digits than its factorization.

660529997928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4054039 (or 4054032 counting only the distinct ones).

The product of its (nonzero) digits is 264539520, while the sum is 72.

The spelling of 660529997928 in words is "six hundred sixty billion, five hundred twenty-nine million, nine hundred ninety-seven thousand, nine hundred twenty-eight".