686716770 has 32 divisors (see below), whose sum is σ = 1649693952. Its totient is φ = 182949632.

The previous prime is 686716741. The next prime is 686716787. The reversal of 686716770 is 77617686.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 22714 + ... + 43466.

It is an arithmetic number, because the mean of its divisors is an integer number (51552936).

Almost surely, 2^686716770 is an apocalyptic number.

686716770 is an abundant number, since it is smaller than the sum of its proper divisors (962977182).

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

686716770 is a wasteful number, since it uses less digits than its factorization.

686716770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21866.

The product of its (nonzero) digits is 592704, while the sum is 48.

The square root of 686716770 is about 26205.2813379288. The cubic root of 686716770 is about 882.2517959015.

The spelling of 686716770 in words is "six hundred eighty-six million, seven hundred sixteen thousand, seven hundred seventy".