676666680 has 64 divisors (see below), whose sum is σ = 2037428640. Its totient is φ = 179784192.

The previous prime is 676666673. The next prime is 676666699. The reversal of 676666680 is 86666676.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 23062 + ... + 43418.

Almost surely, 2^676666680 is an apocalyptic number.

676666680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 676666680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1018714320).

676666680 is an abundant number, since it is smaller than the sum of its proper divisors (1360761960).

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

676666680 is a wasteful number, since it uses less digits than its factorization.

676666680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20648 (or 20644 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 51.

The square root of 676666680 is about 26012.8176097861. The cubic root of 676666680 is about 877.9267135105.

The spelling of 676666680 in words is "six hundred seventy-six million, six hundred sixty-six thousand, six hundred eighty".