667438361086 has 24 divisors (see below), whose sum is σ = 1207569533040. Its totient is φ = 270990009216.

The previous prime is 667438361069. The next prime is 667438361099. The reversal of 667438361086 is 680163834766.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 667438361086.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66025651 + ... + 66035758.

It is an arithmetic number, because the mean of its divisors is an integer number (50315397210).

Almost surely, 2^667438361086 is an apocalyptic number.

667438361086 is a deficient number, since it is larger than the sum of its proper divisors (540131171954).

667438361086 is a wasteful number, since it uses less digits than its factorization.

667438361086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132061456 (or 132061437 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 58.

The spelling of 667438361086 in words is "six hundred sixty-seven billion, four hundred thirty-eight million, three hundred sixty-one thousand, eighty-six".