672447725 has 12 divisors (see below), whose sum is σ = 834318996. Its totient is φ = 537646080.

The previous prime is 672447707. The next prime is 672447751. The reversal of 672447725 is 527744276.

672447725 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 23319241 + 649128484 = 4829^2 + 25478^2 .

It is not a de Polignac number, because 672447725 - 2⁶ = 672447661 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42509 + ... + 56141.

It is an arithmetic number, because the mean of its divisors is an integer number (69526583).

Almost surely, 2^672447725 is an apocalyptic number.

It is an amenable number.

672447725 is a deficient number, since it is larger than the sum of its proper divisors (161871271).

672447725 is a wasteful number, since it uses less digits than its factorization.

672447725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15616 (or 15611 counting only the distinct ones).

The product of its digits is 658560, while the sum is 44.

The square root of 672447725 is about 25931.5970391336. The cubic root of 672447725 is about 876.0983106063.

The spelling of 672447725 in words is "six hundred seventy-two million, four hundred forty-seven thousand, seven hundred twenty-five".