99662686631 has 4 divisors (see below), whose sum is σ = 99665673264. Its totient is φ = 99659700000.

The previous prime is 99662686619. The next prime is 99662686633. The reversal of 99662686631 is 13668626699.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99662686631 is a prime.

It is a super-2 number, since 2×99662686631² (a number of 23 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 (99662686633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1442690 + ... + 1510191.

It is an arithmetic number, because the mean of its divisors is an integer number (24916418316).

Almost surely, 2^99662686631 is an apocalyptic number.

99662686631 is a deficient number, since it is larger than the sum of its proper divisors (2986633).

99662686631 is a wasteful number, since it uses less digits than its factorization.

99662686631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2986632.

The product of its digits is 30233088, while the sum is 62.

The spelling of 99662686631 in words is "ninety-nine billion, six hundred sixty-two million, six hundred eighty-six thousand, six hundred thirty-one".