699649864 has 16 divisors (see below), whose sum is σ = 1314064620. Its totient is φ = 349232640.

The previous prime is 699649859. The next prime is 699649877. The reversal of 699649864 is 468946996.

It can be written as a sum of positive squares in 2 ways, for example, as 573985764 + 125664100 = 23958^2 + 11210^2 .

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, 68997 + ... + 78484.

Almost surely, 2^699649864 is an apocalyptic number.

It is an amenable number.

699649864 is a deficient number, since it is larger than the sum of its proper divisors (614414756).

699649864 is a wasteful number, since it uses less digits than its factorization.

699649864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148080 (or 148076 counting only the distinct ones).

The product of its digits is 20155392, while the sum is 61.

The square root of 699649864 is about 26450.8953345629. The cubic root of 699649864 is about 887.7559355499.

The spelling of 699649864 in words is "six hundred ninety-nine million, six hundred forty-nine thousand, eight hundred sixty-four".