667688361836 has 48 divisors (see below), whose sum is σ = 1211258149920. Its totient is φ = 321824954880.

The previous prime is 667688361817. The next prime is 667688361853. The reversal of 667688361836 is 638163886766.

It is a happy number.

It is a super-2 number, since 2×667688361836² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6777266 + ... + 6875078.

It is an arithmetic number, because the mean of its divisors is an integer number (25234544790).

Almost surely, 2^667688361836 is an apocalyptic number.

It is an amenable number.

667688361836 is a deficient number, since it is larger than the sum of its proper divisors (543569788084).

667688361836 is a wasteful number, since it uses less digits than its factorization.

667688361836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98354 (or 98352 counting only the distinct ones).

The product of its digits is 250822656, while the sum is 68.

The spelling of 667688361836 in words is "six hundred sixty-seven billion, six hundred eighty-eight million, three hundred sixty-one thousand, eight hundred thirty-six".