667701576608 has 36 divisors (see below), whose sum is σ = 1444904840610. Its totient is φ = 303500714880.

The previous prime is 667701576557. The next prime is 667701576611. The reversal of 667701576608 is 806675107766.

It can be written as a sum of positive squares in only one way, i.e., 663814303504 + 3887273104 = 814748^2 + 62348^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 86217923 + ... + 86225666.

Almost surely, 2^667701576608 is an apocalyptic number.

It is an amenable number.

667701576608 is an abundant number, since it is smaller than the sum of its proper divisors (777203264002).

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

667701576608 is a wasteful number, since it uses less digits than its factorization.

667701576608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172443621 (or 172443602 counting only the distinct ones).

The product of its (nonzero) digits is 17781120, while the sum is 59.

The spelling of 667701576608 in words is "six hundred sixty-seven billion, seven hundred one million, five hundred seventy-six thousand, six hundred eight".