6628737980 has 12 divisors (see below), whose sum is σ = 13920349800. Its totient is φ = 2651495184.

The previous prime is 6628737961. The next prime is 6628738007. The reversal of 6628737980 is 897378266.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165718430 + ... + 165718469.

It is an arithmetic number, because the mean of its divisors is an integer number (1160029150).

Almost surely, 2^6628737980 is an apocalyptic number.

It is an amenable number.

6628737980 is an abundant number, since it is smaller than the sum of its proper divisors (7291611820).

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

6628737980 is a wasteful number, since it uses less digits than its factorization.

6628737980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331436908 (or 331436906 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 56.

The square root of 6628737980 is about 81417.0619710635. The cubic root of 6628737980 is about 1878.4960414152.

The spelling of 6628737980 in words is "six billion, six hundred twenty-eight million, seven hundred thirty-seven thousand, nine hundred eighty".