6646589744496 has 80 divisors (see below), whose sum is σ = 18713938647936. Its totient is φ = 2020464707328.

The previous prime is 6646589744449. The next prime is 6646589744533. The reversal of 6646589744496 is 6944479856466.

It is a Harshad number since it is a multiple of its sum of digits (78).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64114390 + ... + 64217973.

Almost surely, 2^{6646589744496} is an apocalyptic number.

It is an amenable number.

6646589744496 is an abundant number, since it is smaller than the sum of its proper divisors (12067348903440).

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

6646589744496 is a wasteful number, since it uses less digits than its factorization.

6646589744496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128332470 (or 128332464 counting only the distinct ones).

The product of its digits is 7524679680, while the sum is 78.

The spelling of 6646589744496 in words is "six trillion, six hundred forty-six billion, five hundred eighty-nine million, seven hundred forty-four thousand, four hundred ninety-six".