669351868 has 12 divisors (see below), whose sum is σ = 1171550520. Its totient is φ = 334623152.

The previous prime is 669351821. The next prime is 669351877. The reversal of 669351868 is 868153966.

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, 34455 + ... + 50257.

It is an arithmetic number, because the mean of its divisors is an integer number (97629210).

Almost surely, 2^669351868 is an apocalyptic number.

It is an amenable number.

669351868 is a deficient number, since it is larger than the sum of its proper divisors (502198652).

669351868 is a wasteful number, since it uses less digits than its factorization.

669351868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26396 (or 26394 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 52.

The square root of 669351868 is about 25871.8354200084. The cubic root of 669351868 is about 874.7517632692.

The spelling of 669351868 in words is "six hundred sixty-nine million, three hundred fifty-one thousand, eight hundred sixty-eight".