687700776 has 64 divisors (see below), whose sum is σ = 2028257280. Its totient is φ = 190146240.

The previous prime is 687700771. The next prime is 687700781. The reversal of 687700776 is 677007786.

It is an interprime number because it is at equal distance from previous prime (687700771) and next prime (687700781).

It is a super-2 number, since 2×687700776² = 945864714622004352, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (687700771) by changing a digit.

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, 60816 + ... + 71231.

It is an arithmetic number, because the mean of its divisors is an integer number (31691520).

Almost surely, 2^687700776 is an apocalyptic number.

It is an amenable number.

687700776 is an abundant number, since it is smaller than the sum of its proper divisors (1340556504).

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

687700776 is a wasteful number, since it uses less digits than its factorization.

687700776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132094 (or 132090 counting only the distinct ones).

The product of its (nonzero) digits is 691488, while the sum is 48.

The square root of 687700776 is about 26224.0495728635. The cubic root of 687700776 is about 882.6729917380.

The spelling of 687700776 in words is "six hundred eighty-seven million, seven hundred thousand, seven hundred seventy-six".