680669636 has 12 divisors (see below), whose sum is σ = 1242962112. Its totient is φ = 325537608.

The previous prime is 680669621. The next prime is 680669669. The reversal of 680669636 is 636966086.

It is a super-2 number, since 2×680669636² = 926622306744744992, which contains 22 as substring.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3699200 + ... + 3699383.

It is an arithmetic number, because the mean of its divisors is an integer number (103580176).

Almost surely, 2^680669636 is an apocalyptic number.

It is an amenable number.

680669636 is a deficient number, since it is larger than the sum of its proper divisors (562292476).

680669636 is a wasteful number, since it uses less digits than its factorization.

680669636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7398610 (or 7398608 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 50.

The square root of 680669636 is about 26089.6461455498. The cubic root of 680669636 is about 879.6544941861.

The spelling of 680669636 in words is "six hundred eighty million, six hundred sixty-nine thousand, six hundred thirty-six".