667670587706 has 16 divisors (see below), whose sum is σ = 1036465916040. Its totient is φ = 322191401280.

The previous prime is 667670587679. The next prime is 667670587739. The reversal of 667670587706 is 607785076766.

It can be written as a sum of positive squares in 4 ways, for example, as 542740150681 + 124930437025 = 736709^2 + 353455^2 .

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 7 ways as a sum of consecutive naturals, for example, 2220485 + ... + 2503176.

Almost surely, 2^667670587706 is an apocalyptic number.

667670587706 is a deficient number, since it is larger than the sum of its proper divisors (368795328334).

667670587706 is a wasteful number, since it uses less digits than its factorization.

667670587706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4726129.

The product of its (nonzero) digits is 124467840, while the sum is 65.

The spelling of 667670587706 in words is "six hundred sixty-seven billion, six hundred seventy million, five hundred eighty-seven thousand, seven hundred six".