6646512 has 20 divisors (see below), whose sum is σ = 17170280. Its totient is φ = 2215488.

The previous prime is 6646511. The next prime is 6646513. The reversal of 6646512 is 2156466.

It is an interprime number because it is at equal distance from previous prime (6646511) and next prime (6646513).

It is a super-2 number, since 2×6646512² = 88352243532288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6646512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6646511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69187 + ... + 69282.

It is an arithmetic number, because the mean of its divisors is an integer number (858514).

Almost surely, 2^6646512 is an apocalyptic number.

It is an amenable number.

6646512 is an abundant number, since it is smaller than the sum of its proper divisors (10523768).

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

6646512 is a wasteful number, since it uses less digits than its factorization.

6646512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138480 (or 138474 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

The square root of 6646512 is about 2578.0830087489. The cubic root of 6646512 is about 188.0173516503.

The spelling of 6646512 in words is "six million, six hundred forty-six thousand, five hundred twelve".