668212292 has 48 divisors (see below), whose sum is σ = 1355323200. Its totient is φ = 285068160.

The previous prime is 668212283. The next prime is 668212351. The reversal of 668212292 is 292212866.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87458 + ... + 94790.

It is an arithmetic number, because the mean of its divisors is an integer number (28235900).

Almost surely, 2^668212292 is an apocalyptic number.

It is an amenable number.

668212292 is an abundant number, since it is smaller than the sum of its proper divisors (687110908).

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

668212292 is a wasteful number, since it uses less digits than its factorization.

668212292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7476 (or 7474 counting only the distinct ones).

The product of its digits is 41472, while the sum is 38.

The square root of 668212292 is about 25849.8025524374. The cubic root of 668212292 is about 874.2550577191.

The spelling of 668212292 in words is "six hundred sixty-eight million, two hundred twelve thousand, two hundred ninety-two".