667208668 has 12 divisors (see below), whose sum is σ = 1334417392. Its totient is φ = 285946560.

The previous prime is 667208657. The next prime is 667208669. The reversal of 667208668 is 866802766.

667208668 is an admirable number.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667208669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11914413 + ... + 11914468.

Almost surely, 2^667208668 is an apocalyptic number.

It is an amenable number.

667208668 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

667208668 is a wasteful number, since it uses less digits than its factorization.

667208668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23828892 (or 23828890 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 49.

The square root of 667208668 is about 25830.3826529922. The cubic root of 667208668 is about 873.8171414967.

The spelling of 667208668 in words is "six hundred sixty-seven million, two hundred eight thousand, six hundred sixty-eight".