699394660 has 24 divisors (see below), whose sum is σ = 1474454520. Its totient is φ = 278667264.

The previous prime is 699394589. The next prime is 699394691. The reversal of 699394660 is 66493996.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 240064036 + 459330624 = 15494^2 + 21432^2 .

It is a junction number, because it is equal to n+sod(n) for n = 699394598 and 699394607.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 62895 + ... + 73174.

It is an arithmetic number, because the mean of its divisors is an integer number (61435605).

Almost surely, 2^699394660 is an apocalyptic number.

It is an amenable number.

699394660 is an abundant number, since it is smaller than the sum of its proper divisors (775059860).

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

699394660 is a wasteful number, since it uses less digits than its factorization.

699394660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136335 (or 136333 counting only the distinct ones).

The product of its (nonzero) digits is 1889568, while the sum is 52.

The square root of 699394660 is about 26446.0707856574. The cubic root of 699394660 is about 887.6479832586.

The spelling of 699394660 in words is "six hundred ninety-nine million, three hundred ninety-four thousand, six hundred sixty".