6719900625 has 45 divisors (see below), whose sum is σ = 12140378679. Its totient is φ = 3580668000.

The previous prime is 6719900591. The next prime is 6719900647. The reversal of 6719900625 is 5260099176.

It is a happy number.

The square root of 6719900625 is 81975.

It is a perfect power (a square), and thus also a powerful number.

6719900625 is a `hidden beast` number, since 6 + 7 + 19 + 9 + 0 + 0 + 625 = 666.

It can be written as a sum of positive squares in 7 ways, for example, as 1042579521 + 5677321104 = 32289^2 + 75348^2 .

It is a tau number, because it is divible by the number of its divisors (45).

It is a de Polignac number, because none of the positive numbers 2^k-6719900625 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 6147579 + ... + 6148671.

Almost surely, 2^6719900625 is an apocalyptic number.

6719900625 is the 81975-th square number.

6719900625 is the 40988-th centered octagonal number.

It is an amenable number.

6719900625 is a deficient number, since it is larger than the sum of its proper divisors (5420478054).

6719900625 is an frugal number, since it uses more digits than its factorization.

6719900625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2212 (or 1101 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The cubic root of 6719900625 is about 1887.0682900800.

The spelling of 6719900625 in words is "six billion, seven hundred nineteen million, nine hundred thousand, six hundred twenty-five".