667210400012 has 12 divisors (see below), whose sum is σ = 1257434984736. Its totient is φ = 307943261520.

The previous prime is 667210399951. The next prime is 667210400023. The reversal of 667210400012 is 210004012766.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6415484564 + ... + 6415484667.

It is an arithmetic number, because the mean of its divisors is an integer number (104786248728).

Almost surely, 2^667210400012 is an apocalyptic number.

It is an amenable number.

667210400012 is a deficient number, since it is larger than the sum of its proper divisors (590224584724).

667210400012 is a wasteful number, since it uses less digits than its factorization.

667210400012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12830969248 (or 12830969246 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

Adding to 667210400012 its reverse (210004012766), we get a palindrome (877214412778).

The spelling of 667210400012 in words is "six hundred sixty-seven billion, two hundred ten million, four hundred thousand, twelve".