699668698631 has 32 divisors (see below), whose sum is σ = 854861629440. Its totient is φ = 559320907104.

The previous prime is 699668698627. The next prime is 699668698681. The reversal of 699668698631 is 136896866996.

It is a cyclic number.

It is not a de Polignac number, because 699668698631 - 2² = 699668698627 is a prime.

It is a super-2 number, since 2×699668698631² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (699668698681) 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 31 ways as a sum of consecutive naturals, for example, 3012056 + ... + 3236018.

It is an arithmetic number, because the mean of its divisors is an integer number (26714425920).

Almost surely, 2^699668698631 is an apocalyptic number.

699668698631 is a deficient number, since it is larger than the sum of its proper divisors (155192930809).

699668698631 is a wasteful number, since it uses less digits than its factorization.

699668698631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224355.

The product of its digits is 1088391168, while the sum is 77.

The spelling of 699668698631 in words is "six hundred ninety-nine billion, six hundred sixty-eight million, six hundred ninety-eight thousand, six hundred thirty-one".