667544867137 has 8 divisors (see below), whose sum is σ = 669134753280. Its totient is φ = 665956178640.

The previous prime is 667544867117. The next prime is 667544867147. The reversal of 667544867137 is 731768445766.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 667544867137 - 2³⁵ = 633185128769 is a prime.

It is a super-2 number, since 2×667544867137² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667544867117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 821664 + ... + 1417822.

It is an arithmetic number, because the mean of its divisors is an integer number (83641844160).

Almost surely, 2^667544867137 is an apocalyptic number.

It is an amenable number.

667544867137 is a deficient number, since it is larger than the sum of its proper divisors (1589886143).

667544867137 is a wasteful number, since it uses less digits than its factorization.

667544867137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598823.

The product of its digits is 142248960, while the sum is 64.

The spelling of 667544867137 in words is "six hundred sixty-seven billion, five hundred forty-four million, eight hundred sixty-seven thousand, one hundred thirty-seven".