6721207725 has 48 divisors (see below), whose sum is σ = 11895667200. Its totient is φ = 3338377920.

The previous prime is 6721207673. The next prime is 6721207733. The reversal of 6721207725 is 5277021276.

It is not a de Polignac number, because 6721207725 - 2¹⁶ = 6721142189 is a prime.

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 (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 44104 + ... + 124046.

It is an arithmetic number, because the mean of its divisors is an integer number (247826400).

Almost surely, 2^6721207725 is an apocalyptic number.

It is an amenable number.

6721207725 is a deficient number, since it is larger than the sum of its proper divisors (5174459475).

6721207725 is a wasteful number, since it uses less digits than its factorization.

6721207725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80034 (or 80029 counting only the distinct ones).

The product of its (nonzero) digits is 82320, while the sum is 39.

The square root of 6721207725 is about 81982.9721649563. The cubic root of 6721207725 is about 1887.1906345009.

The spelling of 6721207725 in words is "six billion, seven hundred twenty-one million, two hundred seven thousand, seven hundred twenty-five".