667438736012 has 36 divisors (see below), whose sum is σ = 1210220649456. Its totient is φ = 322068626880.

The previous prime is 667438735979. The next prime is 667438736021. The reversal of 667438736012 is 210637834766.

667438736012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 7731278 + ... + 7817130.

Almost surely, 2^667438736012 is an apocalyptic number.

It is an amenable number.

667438736012 is a deficient number, since it is larger than the sum of its proper divisors (542781913444).

667438736012 is a wasteful number, since it uses less digits than its factorization.

667438736012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88226 (or 88195 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 53.

The spelling of 667438736012 in words is "six hundred sixty-seven billion, four hundred thirty-eight million, seven hundred thirty-six thousand, twelve".