667606672735506 has 96 divisors (see below), whose sum is σ = 1730730904560000. Its totient is φ = 190198216774944.

The previous prime is 667606672735493. The next prime is 667606672735517. The reversal of 667606672735506 is 605537276606766.

667606672735506 is a `hidden beast` number, since 6 + 6 + 7 + 6 + 0 + 6 + 67 + 2 + 7 + 3 + 550 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 360549166 + ... + 362396073.

It is an arithmetic number, because the mean of its divisors is an integer number (18028446922500).

Almost surely, 2^{667606672735506} is an apocalyptic number.

667606672735506 is an abundant number, since it is smaller than the sum of its proper divisors (1063124231824494).

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

667606672735506 is a wasteful number, since it uses less digits than its factorization.

667606672735506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722945613 (or 722945600 counting only the distinct ones).

The product of its (nonzero) digits is 2400451200, while the sum is 72.

The spelling of 667606672735506 in words is "six hundred sixty-seven trillion, six hundred six billion, six hundred seventy-two million, seven hundred thirty-five thousand, five hundred six".