306699668 has 30 divisors (see below), whose sum is σ = 590505930. Its totient is φ = 139382320.

The previous prime is 306699619. The next prime is 306699671. The reversal of 306699668 is 866996603.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 295221124 + 11478544 = 17182^2 + 3388^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 55946 + ... + 61182.

It is an arithmetic number, because the mean of its divisors is an integer number (19683531).

Almost surely, 2^306699668 is an apocalyptic number.

It is an amenable number.

306699668 is a deficient number, since it is larger than the sum of its proper divisors (283806262).

306699668 is an equidigital number, since it uses as much as digits as its factorization.

306699668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5285 (or 5250 counting only the distinct ones).

The product of its (nonzero) digits is 2519424, while the sum is 53.

The square root of 306699668 is about 17512.8429445364. The cubic root of 306699668 is about 674.3796169120.

The spelling of 306699668 in words is "three hundred six million, six hundred ninety-nine thousand, six hundred sixty-eight".