686866608 has 40 divisors (see below), whose sum is σ = 1971562800. Its totient is φ = 228955392.

The previous prime is 686866577. The next prime is 686866619. The reversal of 686866608 is 806668686.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 7 ways as a sum of consecutive naturals, for example, 794553 + ... + 795416.

It is an arithmetic number, because the mean of its divisors is an integer number (49289070).

Almost surely, 2^686866608 is an apocalyptic number.

It is an amenable number.

686866608 is an abundant number, since it is smaller than the sum of its proper divisors (1284696192).

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

686866608 is a wasteful number, since it uses less digits than its factorization.

686866608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1589986 (or 1589974 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 54.

The square root of 686866608 is about 26208.1401095156. The cubic root of 686866608 is about 882.3159588076.

The spelling of 686866608 in words is "six hundred eighty-six million, eight hundred sixty-six thousand, six hundred eight".