667648886774 has 12 divisors (see below), whose sum is σ = 1037197708404. Its totient is φ = 322313254872.

The previous prime is 667648886747. The next prime is 667648886789. The reversal of 667648886774 is 477688846766.

It is a super-2 number, since 2×667648886774² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 667648886695 and 667648886704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 198467072 + ... + 198470435.

It is an arithmetic number, because the mean of its divisors is an integer number (86433142367).

Almost surely, 2^667648886774 is an apocalyptic number.

667648886774 is a deficient number, since it is larger than the sum of its proper divisors (369548821630).

667648886774 is a wasteful number, since it uses less digits than its factorization.

667648886774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396937567 (or 396937538 counting only the distinct ones).

The product of its digits is 3641573376, while the sum is 77.

The spelling of 667648886774 in words is "six hundred sixty-seven billion, six hundred forty-eight million, eight hundred eighty-six thousand, seven hundred seventy-four".