6646582040 has 32 divisors (see below), whose sum is σ = 17091211680. Its totient is φ = 2278828032.

The previous prime is 6646582027. The next prime is 6646582073. The reversal of 6646582040 is 402856466.

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, 11868617 + ... + 11869176.

It is an arithmetic number, because the mean of its divisors is an integer number (534100365).

Almost surely, 2^6646582040 is an apocalyptic number.

It is an amenable number.

6646582040 is an abundant number, since it is smaller than the sum of its proper divisors (10444629640).

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

6646582040 is a wasteful number, since it uses less digits than its factorization.

6646582040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23737811 (or 23737807 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 41.

The square root of 6646582040 is about 81526.5726005945. The cubic root of 6646582040 is about 1880.1801208138.

The spelling of 6646582040 in words is "six billion, six hundred forty-six million, five hundred eighty-two thousand, forty".