668445562 has 8 divisors (see below), whose sum is σ = 1024001856. Its totient is φ = 327111612.

The previous prime is 668445551. The next prime is 668445571. The reversal of 668445562 is 265544866.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 3555468 + ... + 3555655.

It is an arithmetic number, because the mean of its divisors is an integer number (128000232).

Almost surely, 2^668445562 is an apocalyptic number.

668445562 is a deficient number, since it is larger than the sum of its proper divisors (355556294).

668445562 is a wasteful number, since it uses less digits than its factorization.

668445562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7111172.

The product of its digits is 1382400, while the sum is 46.

The square root of 668445562 is about 25854.3141854508. The cubic root of 668445562 is about 874.3567787605.

The spelling of 668445562 in words is "six hundred sixty-eight million, four hundred forty-five thousand, five hundred sixty-two".