6546664644 has 24 divisors (see below), whose sum is σ = 16450593600. Its totient is φ = 2014358304.

The previous prime is 6546664637. The next prime is 6546664651. The reversal of 6546664644 is 4464666456.

It is an interprime number because it is at equal distance from previous prime (6546664637) and next prime (6546664651).

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, 20982744 + ... + 20983055.

It is an arithmetic number, because the mean of its divisors is an integer number (685441400).

Almost surely, 2^6546664644 is an apocalyptic number.

It is an amenable number.

6546664644 is an abundant number, since it is smaller than the sum of its proper divisors (9903928956).

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

6546664644 is a wasteful number, since it uses less digits than its factorization.

6546664644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41965819 (or 41965817 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 51.

The square root of 6546664644 is about 80911.4617591352. The cubic root of 6546664644 is about 1870.7109923769.

The spelling of 6546664644 in words is "six billion, five hundred forty-six million, six hundred sixty-four thousand, six hundred forty-four".