6676645644 has 42 divisors (see below), whose sum is σ = 17518188660. Its totient is φ = 2225547576.

The previous prime is 6676645639. The next prime is 6676645687. The reversal of 6676645644 is 4465466766.

It is a happy number.

6676645644 is a `hidden beast` number, since 6 + 6 + 76 + 6 + 4 + 564 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 1141914 + ... + 1147745.

It is an arithmetic number, because the mean of its divisors is an integer number (417099730).

Almost surely, 2^6676645644 is an apocalyptic number.

It is an amenable number.

6676645644 is an abundant number, since it is smaller than the sum of its proper divisors (10841543016).

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

6676645644 is a wasteful number, since it uses less digits than its factorization.

6676645644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2289681 (or 2289664 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 54.

The square root of 6676645644 is about 81710.7437489098. The cubic root of 6676645644 is about 1883.0106473297.

The spelling of 6676645644 in words is "six billion, six hundred seventy-six million, six hundred forty-five thousand, six hundred forty-four".