660633867852 has 96 divisors (see below), whose sum is σ = 1877838681600. Its totient is φ = 176457108480.

The previous prime is 660633867809. The next prime is 660633867871. The reversal of 660633867852 is 258768336066.

It is a happy number.

It is a hoax number, since the sum of its digits (60) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1339674 + ... + 1765217.

It is an arithmetic number, because the mean of its divisors is an integer number (19560819600).

Almost surely, 2^660633867852 is an apocalyptic number.

It is an amenable number.

660633867852 is an abundant number, since it is smaller than the sum of its proper divisors (1217204813748).

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

660633867852 is a wasteful number, since it uses less digits than its factorization.

660633867852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3105071 (or 3105069 counting only the distinct ones).

The product of its (nonzero) digits is 52254720, while the sum is 60.

The spelling of 660633867852 in words is "six hundred sixty billion, six hundred thirty-three million, eight hundred sixty-seven thousand, eight hundred fifty-two".