686620336 has 10 divisors (see below), whose sum is σ = 1330326932. Its totient is φ = 343310160.

The previous prime is 686620307. The next prime is 686620343. The reversal of 686620336 is 633026686.

It is a happy number.

It is a super-3 number, since 3×686620336³ (a number of 27 digits) contains 333 as substring.

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 as a sum of consecutive naturals, namely, 21456870 + ... + 21456901.

Almost surely, 2^686620336 is an apocalyptic number.

It is an amenable number.

686620336 is a deficient number, since it is larger than the sum of its proper divisors (643706596).

686620336 is a wasteful number, since it uses less digits than its factorization.

686620336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42913779 (or 42913773 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 40.

The square root of 686620336 is about 26203.4413007147. The cubic root of 686620336 is about 882.2104964622.

The spelling of 686620336 in words is "six hundred eighty-six million, six hundred twenty thousand, three hundred thirty-six".