682646646 has 16 divisors (see below), whose sum is σ = 1489411008. Its totient is φ = 206862600.

The previous prime is 682646639. The next prime is 682646651. The reversal of 682646646 is 646646286.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 682646595 and 682646604.

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, 5171500 + ... + 5171631.

It is an arithmetic number, because the mean of its divisors is an integer number (93088188).

Almost surely, 2^682646646 is an apocalyptic number.

682646646 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

682646646 is an abundant number, since it is smaller than the sum of its proper divisors (806764362).

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

682646646 is a wasteful number, since it uses less digits than its factorization.

682646646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10343147.

The product of its digits is 1990656, while the sum is 48.

The square root of 682646646 is about 26127.5074586153. The cubic root of 682646646 is about 880.5053253001.

The spelling of 682646646 in words is "six hundred eighty-two million, six hundred forty-six thousand, six hundred forty-six".