667720712716 has 12 divisors (see below), whose sum is σ = 1174565711032. Its totient is φ = 332130509568.

The previous prime is 667720712693. The next prime is 667720712723. The reversal of 667720712716 is 617217027766.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 432460830 + ... + 432462373.

Almost surely, 2^667720712716 is an apocalyptic number.

It is an amenable number.

667720712716 is a deficient number, since it is larger than the sum of its proper divisors (506844998316).

667720712716 is a wasteful number, since it uses less digits than its factorization.

667720712716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864923400 (or 864923398 counting only the distinct ones).

The product of its (nonzero) digits is 2074464, while the sum is 52.

The spelling of 667720712716 in words is "six hundred sixty-seven billion, seven hundred twenty million, seven hundred twelve thousand, seven hundred sixteen".