668259500 has 24 divisors (see below), whose sum is σ = 1459479840. Its totient is φ = 267303600.

The previous prime is 668259497. The next prime is 668259509. The reversal of 668259500 is 5952866.

It is not an unprimeable number, because it can be changed into a prime (668259509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 667760 + ... + 668759.

It is an arithmetic number, because the mean of its divisors is an integer number (60811660).

Almost surely, 2^668259500 is an apocalyptic number.

It is an amenable number.

668259500 is an abundant number, since it is smaller than the sum of its proper divisors (791220340).

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

668259500 is a wasteful number, since it uses less digits than its factorization.

668259500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336538 (or 1336526 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 668259500 is about 25850.7156574049. The cubic root of 668259500 is about 874.2756454182.

The spelling of 668259500 in words is "six hundred sixty-eight million, two hundred fifty-nine thousand, five hundred".