667072637 has 24 divisors (see below), whose sum is σ = 851778816. Its totient is φ = 511236000.

The previous prime is 667072621. The next prime is 667072687. The reversal of 667072637 is 736270766.

It is not a de Polignac number, because 667072637 - 2⁴ = 667072621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667072687) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 45212 + ... + 58122.

It is an arithmetic number, because the mean of its divisors is an integer number (35490784).

Almost surely, 2^667072637 is an apocalyptic number.

It is an amenable number.

667072637 is a deficient number, since it is larger than the sum of its proper divisors (184706179).

667072637 is a wasteful number, since it uses less digits than its factorization.

667072637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13001 (or 12990 counting only the distinct ones).

The product of its (nonzero) digits is 444528, while the sum is 44.

The square root of 667072637 is about 25827.7493599423. The cubic root of 667072637 is about 873.7577526306.

The spelling of 667072637 in words is "six hundred sixty-seven million, seventy-two thousand, six hundred thirty-seven".