687665006 has 16 divisors (see below), whose sum is σ = 1179630816. Its totient is φ = 294519456.

The previous prime is 687664993. The next prime is 687665029. The reversal of 687665006 is 600566786.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6980 + ... + 37736.

It is an arithmetic number, because the mean of its divisors is an integer number (73726926).

Almost surely, 2^687665006 is an apocalyptic number.

687665006 is a deficient number, since it is larger than the sum of its proper divisors (491965810).

687665006 is a wasteful number, since it uses less digits than its factorization.

687665006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32363.

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 687665006 is about 26223.3675564371. The cubic root of 687665006 is about 882.6576877175.

The spelling of 687665006 in words is "six hundred eighty-seven million, six hundred sixty-five thousand, six".