667067568 has 20 divisors (see below), whose sum is σ = 1723258008. Its totient is φ = 222355840.

The previous prime is 667067567. The next prime is 667067623. The reversal of 667067568 is 865760766.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 667067568.

It is not an unprimeable number, because it can be changed into a prime (667067563) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 6948573 + ... + 6948668.

Almost surely, 2^667067568 is an apocalyptic number.

It is an amenable number.

667067568 is an abundant number, since it is smaller than the sum of its proper divisors (1056190440).

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

667067568 is a wasteful number, since it uses less digits than its factorization.

667067568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13897252 (or 13897246 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 51.

The square root of 667067568 is about 25827.6512288671. The cubic root of 667067568 is about 873.7555394337.

The spelling of 667067568 in words is "six hundred sixty-seven million, sixty-seven thousand, five hundred sixty-eight".