667760766 has 16 divisors (see below), whose sum is σ = 1342902288. Its totient is φ = 221356800.

The previous prime is 667760741. The next prime is 667760767. The reversal of 667760766 is 667067766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667760767) 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, 306355 + ... + 308526.

It is an arithmetic number, because the mean of its divisors is an integer number (83931393).

Almost surely, 2^667760766 is an apocalyptic number.

667760766 is an abundant number, since it is smaller than the sum of its proper divisors (675141522).

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

667760766 is a wasteful number, since it uses less digits than its factorization.

667760766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615067.

The product of its (nonzero) digits is 2667168, while the sum is 51.

The square root of 667760766 is about 25841.0674315130. The cubic root of 667760766 is about 874.0580954458.

The spelling of 667760766 in words is "six hundred sixty-seven million, seven hundred sixty thousand, seven hundred sixty-six".