668038212 has 24 divisors (see below), whose sum is σ = 1731951200. Its totient is φ = 222679368.

The previous prime is 668038211. The next prime is 668038223. The reversal of 668038212 is 212830866.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (668038211) 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, 3092662 + ... + 3092877.

Almost surely, 2^668038212 is an apocalyptic number.

It is an amenable number.

668038212 is an abundant number, since it is smaller than the sum of its proper divisors (1063912988).

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

668038212 is a wasteful number, since it uses less digits than its factorization.

668038212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6185552 (or 6185544 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 668038212 is about 25846.4351894028. The cubic root of 668038212 is about 874.1791319790.

The spelling of 668038212 in words is "six hundred sixty-eight million, thirty-eight thousand, two hundred twelve".