667696642416 has 30 divisors (see below), whose sum is σ = 1868623242720. Its totient is φ = 222565547424.

The previous prime is 667696642391. The next prime is 667696642429. The reversal of 667696642416 is 614246696766.

It is a happy number.

667696642416 is a `hidden beast` number, since 6 + 6 + 76 + 96 + 64 + 2 + 416 = 666.

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, 2318390976 + ... + 2318391263.

It is an arithmetic number, because the mean of its divisors is an integer number (62287441424).

Almost surely, 2^667696642416 is an apocalyptic number.

It is an amenable number.

667696642416 is an abundant number, since it is smaller than the sum of its proper divisors (1200926600304).

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

667696642416 is a wasteful number, since it uses less digits than its factorization.

667696642416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4636782253 (or 4636782244 counting only the distinct ones).

The product of its digits is 94058496, while the sum is 63.

The spelling of 667696642416 in words is "six hundred sixty-seven billion, six hundred ninety-six million, six hundred forty-two thousand, four hundred sixteen".