6715721772 has 96 divisors (see below), whose sum is σ = 18037252800. Its totient is φ = 2159308800.

The previous prime is 6715721737. The next prime is 6715721809. The reversal of 6715721772 is 2771275176.

6715721772 is a `hidden beast` number, since 6 + 7 + 1 + 572 + 1 + 7 + 72 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 385572 + ... + 402612.

It is an arithmetic number, because the mean of its divisors is an integer number (187888050).

Almost surely, 2^6715721772 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6715721772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9018626400).

6715721772 is an abundant number, since it is smaller than the sum of its proper divisors (11321531028).

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

6715721772 is a wasteful number, since it uses less digits than its factorization.

6715721772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17184 (or 17176 counting only the distinct ones).

The product of its digits is 288120, while the sum is 45.

The square root of 6715721772 is about 81949.5074542855. The cubic root of 6715721772 is about 1886.6770434126.

The spelling of 6715721772 in words is "six billion, seven hundred fifteen million, seven hundred twenty-one thousand, seven hundred seventy-two".