6721562572 has 6 divisors (see below), whose sum is σ = 11762734508. Its totient is φ = 3360781284.

The previous prime is 6721562513. The next prime is 6721562581. The reversal of 6721562572 is 2752651276.

It is a super-2 number, since 2×6721562572² = 90358806818622510368, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840195318 + ... + 840195325.

Almost surely, 2^6721562572 is an apocalyptic number.

It is an amenable number.

6721562572 is a deficient number, since it is larger than the sum of its proper divisors (5041171936).

6721562572 is a wasteful number, since it uses less digits than its factorization.

6721562572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680390647 (or 1680390645 counting only the distinct ones).

The product of its digits is 352800, while the sum is 43.

The square root of 6721562572 is about 81985.1362870124. The cubic root of 6721562572 is about 1887.2238454048.

The spelling of 6721562572 in words is "six billion, seven hundred twenty-one million, five hundred sixty-two thousand, five hundred seventy-two".