686674776 has 32 divisors (see below), whose sum is σ = 1730211840. Its totient is φ = 227088288.

The previous prime is 686674771. The next prime is 686674787. The reversal of 686674776 is 677476686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686674771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109596 + ... + 115691.

It is an arithmetic number, because the mean of its divisors is an integer number (54069120).

Almost surely, 2^686674776 is an apocalyptic number.

It is an amenable number.

686674776 is an abundant number, since it is smaller than the sum of its proper divisors (1043537064).

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

686674776 is a wasteful number, since it uses less digits than its factorization.

686674776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225423 (or 225419 counting only the distinct ones).

The product of its digits is 14224896, while the sum is 57.

The square root of 686674776 is about 26204.4800749795. The cubic root of 686674776 is about 882.2338117588.

The spelling of 686674776 in words is "six hundred eighty-six million, six hundred seventy-four thousand, seven hundred seventy-six".