667667847672 has 96 divisors (see below), whose sum is σ = 2100469594080. Its totient is φ = 187634983680.

The previous prime is 667667847563. The next prime is 667667847677. The reversal of 667667847672 is 276748766766.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 667667847672.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667667847677) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10827763 + ... + 10889250.

It is an arithmetic number, because the mean of its divisors is an integer number (21879891605).

Almost surely, 2^667667847672 is an apocalyptic number.

It is an amenable number.

667667847672 is an abundant number, since it is smaller than the sum of its proper divisors (1432801746408).

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

667667847672 is a wasteful number, since it uses less digits than its factorization.

667667847672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21717093 (or 21717086 counting only the distinct ones).

The product of its digits is 1194891264, while the sum is 72.

The spelling of 667667847672 in words is "six hundred sixty-seven billion, six hundred sixty-seven million, eight hundred forty-seven thousand, six hundred seventy-two".