6721625677 has 12 divisors (see below), whose sum is σ = 7287378420. Its totient is φ = 6196963968.

The previous prime is 6721625671. The next prime is 6721625689. The reversal of 6721625677 is 7765261276.

It can be written as a sum of positive squares in 6 ways, for example, as 3200521 + 6718425156 = 1789^2 + 81966^2 .

It is not a de Polignac number, because 6721625677 - 2⁷ = 6721625549 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6721625677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6721625671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 116113 + ... + 164089.

It is an arithmetic number, because the mean of its divisors is an integer number (607281535).

Almost surely, 2^6721625677 is an apocalyptic number.

It is an amenable number.

6721625677 is a deficient number, since it is larger than the sum of its proper divisors (565752743).

6721625677 is a wasteful number, since it uses less digits than its factorization.

6721625677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48832 (or 48819 counting only the distinct ones).

The product of its digits is 1481760, while the sum is 49.

The square root of 6721625677 is about 81985.5211424554. The cubic root of 6721625677 is about 1887.2297514168.

The spelling of 6721625677 in words is "six billion, seven hundred twenty-one million, six hundred twenty-five thousand, six hundred seventy-seven".