667567336631 has 16 divisors (see below), whose sum is σ = 720929341440. Its totient is φ = 614493176160.

The previous prime is 667567336543. The next prime is 667567336633. The reversal of 667567336631 is 136633765766.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 667567336631 - 2¹⁰ = 667567335607 is a prime.

It is a super-2 number, since 2×667567336631² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667567336633) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 39420236 + ... + 39437166.

It is an arithmetic number, because the mean of its divisors is an integer number (45058083840).

Almost surely, 2^667567336631 is an apocalyptic number.

667567336631 is a deficient number, since it is larger than the sum of its proper divisors (53362004809).

667567336631 is a wasteful number, since it uses less digits than its factorization.

667567336631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25246.

The product of its digits is 51438240, while the sum is 59.

The spelling of 667567336631 in words is "six hundred sixty-seven billion, five hundred sixty-seven million, three hundred thirty-six thousand, six hundred thirty-one".