660668837620 has 48 divisors (see below), whose sum is σ = 1528517765376. Its totient is φ = 237864560000.

The previous prime is 660668837603. The next prime is 660668837629. The reversal of 660668837620 is 26738866066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660668837629) 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, 14844316 + ... + 14888755.

It is an arithmetic number, because the mean of its divisors is an integer number (31844120112).

Almost surely, 2^660668837620 is an apocalyptic number.

It is an amenable number.

660668837620 is an abundant number, since it is smaller than the sum of its proper divisors (867848927756).

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

660668837620 is a wasteful number, since it uses less digits than its factorization.

660668837620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29733192 (or 29733190 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 58.

The spelling of 660668837620 in words is "six hundred sixty billion, six hundred sixty-eight million, eight hundred thirty-seven thousand, six hundred twenty".