667651478131 has 24 divisors (see below), whose sum is σ = 742742138880. Its totient is φ = 599653842480.

The previous prime is 667651478099. The next prime is 667651478147. The reversal of 667651478131 is 131874156766.

It is not a de Polignac number, because 667651478131 - 2⁵ = 667651478099 is a prime.

It is a super-3 number, since 3×667651478131³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667651478231) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 3581820 + ... + 3763606.

It is an arithmetic number, because the mean of its divisors is an integer number (30947589120).

Almost surely, 2^667651478131 is an apocalyptic number.

667651478131 is a deficient number, since it is larger than the sum of its proper divisors (75090660749).

667651478131 is a wasteful number, since it uses less digits than its factorization.

667651478131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182175 (or 182164 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 55.

The spelling of 667651478131 in words is "six hundred sixty-seven billion, six hundred fifty-one million, four hundred seventy-eight thousand, one hundred thirty-one".