668403575252 has 24 divisors (see below), whose sum is σ = 1337709871680. Its totient is φ = 286265234880.

The previous prime is 668403575233. The next prime is 668403575303. The reversal of 668403575252 is 252575304866.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 668403575194 and 668403575203.

It is a congruent number.

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, 8017802 + ... + 8100737.

It is an arithmetic number, because the mean of its divisors is an integer number (55737911320).

Almost surely, 2^668403575252 is an apocalyptic number.

It is an amenable number.

668403575252 is an abundant number, since it is smaller than the sum of its proper divisors (669306296428).

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

668403575252 is a wasteful number, since it uses less digits than its factorization.

668403575252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16120031 (or 16120029 counting only the distinct ones).

The product of its (nonzero) digits is 12096000, while the sum is 53.

The spelling of 668403575252 in words is "six hundred sixty-eight billion, four hundred three million, five hundred seventy-five thousand, two hundred fifty-two".