6616677640 has 32 divisors (see below), whose sum is σ = 14898913560. Its totient is φ = 2644646400.

The previous prime is 6616677637. The next prime is 6616677659. The reversal of 6616677640 is 467766166.

It can be written as a sum of positive squares in 4 ways, for example, as 6479928004 + 136749636 = 80498^2 + 11694^2 .

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, 9771 + ... + 115450.

Almost surely, 2^6616677640 is an apocalyptic number.

It is an amenable number.

6616677640 is an abundant number, since it is smaller than the sum of its proper divisors (8282235920).

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

6616677640 is a wasteful number, since it uses less digits than its factorization.

6616677640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126553 (or 126549 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 49.

The square root of 6616677640 is about 81342.9630638078. The cubic root of 6616677640 is about 1877.3561032338.

The spelling of 6616677640 in words is "six billion, six hundred sixteen million, six hundred seventy-seven thousand, six hundred forty".