688626466 has 16 divisors (see below), whose sum is σ = 1137185280. Its totient is φ = 310139280.

The previous prime is 688626461. The next prime is 688626479. The reversal of 688626466 is 664626886.

It is not an unprimeable number, because it can be changed into a prime (688626461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141186 + ... + 145981.

It is an arithmetic number, because the mean of its divisors is an integer number (71074080).

Almost surely, 2^688626466 is an apocalyptic number.

688626466 is a deficient number, since it is larger than the sum of its proper divisors (448558814).

688626466 is a wasteful number, since it uses less digits than its factorization.

688626466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287289.

The product of its digits is 3981312, while the sum is 52.

The square root of 688626466 is about 26241.6932761588. The cubic root of 688626466 is about 883.0688592670.

The spelling of 688626466 in words is "six hundred eighty-eight million, six hundred twenty-six thousand, four hundred sixty-six".