825665572 has 12 divisors (see below), whose sum is σ = 1455462540. Its totient is φ = 409819136.

The previous prime is 825665567. The next prime is 825665587. The reversal of 825665572 is 275566528.

It can be written as a sum of positive squares in 2 ways, for example, as 649944036 + 175721536 = 25494^2 + 13256^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 752797 + ... + 753892.

It is an arithmetic number, because the mean of its divisors is an integer number (121288545).

Almost surely, 2^825665572 is an apocalyptic number.

It is an amenable number.

825665572 is a deficient number, since it is larger than the sum of its proper divisors (629796968).

825665572 is a wasteful number, since it uses less digits than its factorization.

825665572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1506830 (or 1506828 counting only the distinct ones).

The product of its digits is 1008000, while the sum is 46.

The square root of 825665572 is about 28734.3970182080. The cubic root of 825665572 is about 938.1408750306.

The spelling of 825665572 in words is "eight hundred twenty-five million, six hundred sixty-five thousand, five hundred seventy-two".