667231536788 has 6 divisors (see below), whose sum is σ = 1167655189386. Its totient is φ = 333615768392.

The previous prime is 667231536773. The next prime is 667231536799. The reversal of 667231536788 is 887635132766.

It can be written as a sum of positive squares in only one way, i.e., 634893427204 + 32338109584 = 796802^2 + 179828^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 667231536788.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83403942095 + ... + 83403942102.

It is an arithmetic number, because the mean of its divisors is an integer number (194609198231).

Almost surely, 2^667231536788 is an apocalyptic number.

It is an amenable number.

667231536788 is a deficient number, since it is larger than the sum of its proper divisors (500423652598).

667231536788 is a wasteful number, since it uses less digits than its factorization.

667231536788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166807884201 (or 166807884199 counting only the distinct ones).

The product of its digits is 60963840, while the sum is 62.

The spelling of 667231536788 in words is "six hundred sixty-seven billion, two hundred thirty-one million, five hundred thirty-six thousand, seven hundred eighty-eight".