668536602 has 16 divisors (see below), whose sum is σ = 1339454880. Its totient is φ = 222448592.

The previous prime is 668536597. The next prime is 668536613. The reversal of 668536602 is 206635866.

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, 95577 + ... + 102332.

It is an arithmetic number, because the mean of its divisors is an integer number (83715930).

Almost surely, 2^668536602 is an apocalyptic number.

668536602 is an abundant number, since it is smaller than the sum of its proper divisors (670918278).

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

668536602 is a wasteful number, since it uses less digits than its factorization.

668536602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198477.

The product of its (nonzero) digits is 311040, while the sum is 42.

The square root of 668536602 is about 25856.0747601023. The cubic root of 668536602 is about 874.3964717598.

The spelling of 668536602 in words is "six hundred sixty-eight million, five hundred thirty-six thousand, six hundred two".