668761286924 has 24 divisors (see below), whose sum is σ = 1197593177088. Its totient is φ = 326592378000.

The previous prime is 668761286849. The next prime is 668761286951. The reversal of 668761286924 is 429682167866.

668761286924 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6271049 + ... + 6376799.

It is an arithmetic number, because the mean of its divisors is an integer number (49899715712).

Almost surely, 2^668761286924 is an apocalyptic number.

It is an amenable number.

668761286924 is a deficient number, since it is larger than the sum of its proper divisors (528831890164).

668761286924 is a wasteful number, since it uses less digits than its factorization.

668761286924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142565 (or 142563 counting only the distinct ones).

The product of its digits is 83607552, while the sum is 65.

The spelling of 668761286924 in words is "six hundred sixty-eight billion, seven hundred sixty-one million, two hundred eighty-six thousand, nine hundred twenty-four".