699724668 has 12 divisors (see below), whose sum is σ = 1632690920. Its totient is φ = 233241552.

The previous prime is 699724657. The next prime is 699724687. The reversal of 699724668 is 866427996.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×699724668² = 979229222015420448, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29155183 + ... + 29155206.

Almost surely, 2^699724668 is an apocalyptic number.

It is an amenable number.

699724668 is an abundant number, since it is smaller than the sum of its proper divisors (932966252).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

699724668 is a wasteful number, since it uses less digits than its factorization.

699724668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58310396 (or 58310394 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 57.

The square root of 699724668 is about 26452.3093131772. The cubic root of 699724668 is about 887.7875729598.

The spelling of 699724668 in words is "six hundred ninety-nine million, seven hundred twenty-four thousand, six hundred sixty-eight".