687668700 has 72 divisors (see below), whose sum is σ = 2106708912. Its totient is φ = 172590080.

The previous prime is 687668699. The next prime is 687668741. The reversal of 687668700 is 7866786.

It is a self number, because there is not a number n which added to its sum of digits gives 687668700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62319 + ... + 72518.

It is an arithmetic number, because the mean of its divisors is an integer number (29259846).

Almost surely, 2^687668700 is an apocalyptic number.

687668700 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

687668700 is an abundant number, since it is smaller than the sum of its proper divisors (1419040212).

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

687668700 is a wasteful number, since it uses less digits than its factorization.

687668700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134871 (or 134864 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 48.

The square root of 687668700 is about 26223.4379897068. The cubic root of 687668700 is about 882.6592682020.

The spelling of 687668700 in words is "six hundred eighty-seven million, six hundred sixty-eight thousand, seven hundred".