687875066 has 8 divisors (see below), whose sum is σ = 1059699540. Its totient is φ = 334641888.

The previous prime is 687875059. The next prime is 687875077. The reversal of 687875066 is 660578786.

It can be written as a sum of positive squares in 2 ways, for example, as 565440841 + 122434225 = 23779^2 + 11065^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 687874999 and 687875017.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4647731 + ... + 4647878.

Almost surely, 2^687875066 is an apocalyptic number.

687875066 is a deficient number, since it is larger than the sum of its proper divisors (371824474).

687875066 is a wasteful number, since it uses less digits than its factorization.

687875066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9295648.

The product of its (nonzero) digits is 3386880, while the sum is 53.

The square root of 687875066 is about 26227.3724570343. The cubic root of 687875066 is about 882.7475532753.

The spelling of 687875066 in words is "six hundred eighty-seven million, eight hundred seventy-five thousand, sixty-six".