688766630 has 32 divisors (see below), whose sum is σ = 1251547200. Its totient is φ = 272904832.

The previous prime is 688766621. The next prime is 688766653. The reversal of 688766630 is 36667886.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 620516 + ... + 621624.

It is an arithmetic number, because the mean of its divisors is an integer number (39110850).

Almost surely, 2^688766630 is an apocalyptic number.

688766630 is a deficient number, since it is larger than the sum of its proper divisors (562780570).

688766630 is a wasteful number, since it uses less digits than its factorization.

688766630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1648.

The product of its (nonzero) digits is 1741824, while the sum is 50.

The square root of 688766630 is about 26244.3637758662. The cubic root of 688766630 is about 883.1287688953.

The spelling of 688766630 in words is "six hundred eighty-eight million, seven hundred sixty-six thousand, six hundred thirty".