660765709974 has 48 divisors (see below), whose sum is σ = 1389800922048. Its totient is φ = 209318503968.

The previous prime is 660765709973. The next prime is 660765710023. The reversal of 660765709974 is 479907567066.

660765709974 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×660765709974² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660765709973) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 582192 + ... + 1288595.

It is an arithmetic number, because the mean of its divisors is an integer number (28954185876).

Almost surely, 2^660765709974 is an apocalyptic number.

660765709974 is an abundant number, since it is smaller than the sum of its proper divisors (729035212074).

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

660765709974 is a wasteful number, since it uses less digits than its factorization.

660765709974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1870909 (or 1870872 counting only the distinct ones).

The product of its (nonzero) digits is 120022560, while the sum is 66.

The spelling of 660765709974 in words is "six hundred sixty billion, seven hundred sixty-five million, seven hundred nine thousand, nine hundred seventy-four".