668350901952 has 42 divisors (see below), whose sum is σ = 1915707187628. Its totient is φ = 222783633792.

The previous prime is 668350901923. The next prime is 668350901957. The reversal of 668350901952 is 259109053866.

It is a happy number.

668350901952 is a `hidden beast` number, since 6 + 6 + 83 + 509 + 0 + 1 + 9 + 52 = 666.

668350901952 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (668350901957) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 580165138 + ... + 580166289.

Almost surely, 2^668350901952 is an apocalyptic number.

It is an amenable number.

668350901952 is an abundant number, since it is smaller than the sum of its proper divisors (1247356285676).

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

668350901952 is a wasteful number, since it uses less digits than its factorization.

668350901952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1160331445 (or 1160331432 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 54.

The spelling of 668350901952 in words is "six hundred sixty-eight billion, three hundred fifty million, nine hundred one thousand, nine hundred fifty-two".