667181252432 has 20 divisors (see below), whose sum is σ = 1293562028160. Its totient is φ = 333358793568.

The previous prime is 667181252359. The next prime is 667181252461. The reversal of 667181252432 is 234252181766.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14465798 + ... + 14511845.

It is an arithmetic number, because the mean of its divisors is an integer number (64678101408).

Almost surely, 2^667181252432 is an apocalyptic number.

It is an amenable number.

667181252432 is a deficient number, since it is larger than the sum of its proper divisors (626380775728).

667181252432 is a wasteful number, since it uses less digits than its factorization.

667181252432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28979090 (or 28979084 counting only the distinct ones).

The product of its digits is 967680, while the sum is 47.

The spelling of 667181252432 in words is "six hundred sixty-seven billion, one hundred eighty-one million, two hundred fifty-two thousand, four hundred thirty-two".