668557468 has 12 divisors (see below), whose sum is σ = 1220844240. Its totient is φ = 319744832.

The previous prime is 668557457. The next prime is 668557489. The reversal of 668557468 is 864755866.

668557468 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3633373 + ... + 3633556.

It is an arithmetic number, because the mean of its divisors is an integer number (101737020).

Almost surely, 2^668557468 is an apocalyptic number.

It is an amenable number.

668557468 is a deficient number, since it is larger than the sum of its proper divisors (552286772).

668557468 is a wasteful number, since it uses less digits than its factorization.

668557468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7266956 (or 7266954 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 55.

The square root of 668557468 is about 25856.4782598095. The cubic root of 668557468 is about 874.4055687271.

The spelling of 668557468 in words is "six hundred sixty-eight million, five hundred fifty-seven thousand, four hundred sixty-eight".