6647172642 has 48 divisors (see below), whose sum is σ = 16094725920. Its totient is φ = 1965163200.

The previous prime is 6647172619. The next prime is 6647172647. The reversal of 6647172642 is 2462717466.

It is not an unprimeable number, because it can be changed into a prime (6647172647) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 401292 + ... + 417527.

It is an arithmetic number, because the mean of its divisors is an integer number (335306790).

Almost surely, 2^6647172642 is an apocalyptic number.

6647172642 is an abundant number, since it is smaller than the sum of its proper divisors (9447553278).

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

6647172642 is a wasteful number, since it uses less digits than its factorization.

6647172642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818879 (or 818876 counting only the distinct ones).

The product of its digits is 677376, while the sum is 45.

The square root of 6647172642 is about 81530.1946643083. The cubic root of 6647172642 is about 1880.2358088473.

The spelling of 6647172642 in words is "six billion, six hundred forty-seven million, one hundred seventy-two thousand, six hundred forty-two".