6721012550 has 48 divisors (see below), whose sum is σ = 14294299392. Its totient is φ = 2303162400.

The previous prime is 6721012523. The next prime is 6721012561. The reversal of 6721012550 is 552101276.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 928445 + ... + 935655.

It is an arithmetic number, because the mean of its divisors is an integer number (297797904).

Almost surely, 2^6721012550 is an apocalyptic number.

6721012550 is an abundant number, since it is smaller than the sum of its proper divisors (7573286842).

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

6721012550 is a wasteful number, since it uses less digits than its factorization.

6721012550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9893 (or 9888 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 6721012550 is about 81981.7818176697. The cubic root of 6721012550 is about 1887.1723671492.

The spelling of 6721012550 in words is "six billion, seven hundred twenty-one million, twelve thousand, five hundred fifty".