6646147188 has 48 divisors (see below), whose sum is σ = 15676524864. Its totient is φ = 2191371520.

The previous prime is 6646147187. The next prime is 6646147201. The reversal of 6646147188 is 8817416466.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 6646147188.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6646147187) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 491656 + ... + 504992.

It is an arithmetic number, because the mean of its divisors is an integer number (326594268).

Almost surely, 2^6646147188 is an apocalyptic number.

It is an amenable number.

6646147188 is an abundant number, since it is smaller than the sum of its proper divisors (9030377676).

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

6646147188 is a wasteful number, since it uses less digits than its factorization.

6646147188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13792 (or 13790 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 51.

The square root of 6646147188 is about 81523.9056228294. The cubic root of 6646147188 is about 1880.1391163841.

The spelling of 6646147188 in words is "six billion, six hundred forty-six million, one hundred forty-seven thousand, one hundred eighty-eight".