667975308634 has 8 divisors (see below), whose sum is σ = 1005687733140. Its totient is φ = 332746064256.

The previous prime is 667975308601. The next prime is 667975308731. The reversal of 667975308634 is 436803579766.

It can be written as a sum of positive squares in 2 ways, for example, as 506592333009 + 161382975625 = 711753^2 + 401725^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 620794359 + ... + 620795434.

Almost surely, 2^667975308634 is an apocalyptic number.

667975308634 is a deficient number, since it is larger than the sum of its proper divisors (337712424506).

667975308634 is a wasteful number, since it uses less digits than its factorization.

667975308634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241590064.

The product of its (nonzero) digits is 137168640, while the sum is 64.

The spelling of 667975308634 in words is "six hundred sixty-seven billion, nine hundred seventy-five million, three hundred eight thousand, six hundred thirty-four".