667881039972 has 48 divisors (see below), whose sum is σ = 1576318423680. Its totient is φ = 220067012352.

The previous prime is 667881039961. The next prime is 667881039997. The reversal of 667881039972 is 279930188766.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4027318 + ... + 4189874.

It is an arithmetic number, because the mean of its divisors is an integer number (32839967160).

Almost surely, 2^667881039972 is an apocalyptic number.

It is an amenable number.

667881039972 is an abundant number, since it is smaller than the sum of its proper divisors (908437383708).

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

667881039972 is a wasteful number, since it uses less digits than its factorization.

667881039972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166500 (or 166498 counting only the distinct ones).

The product of its (nonzero) digits is 54867456, while the sum is 66.

The spelling of 667881039972 in words is "six hundred sixty-seven billion, eight hundred eighty-one million, thirty-nine thousand, nine hundred seventy-two".