660526025 has 12 divisors (see below), whose sum is σ = 819877212. Its totient is φ = 527888640.

The previous prime is 660526001. The next prime is 660526037. The reversal of 660526025 is 520625066.

It can be written as a sum of positive squares in 6 ways, for example, as 11703241 + 648822784 = 3421^2 + 25472^2 .

It is a de Polignac number, because none of the positive numbers 2^k-660526025 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 660525982 and 660526000.

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, 13037 + ... + 38613.

It is an arithmetic number, because the mean of its divisors is an integer number (68323101).

Almost surely, 2^660526025 is an apocalyptic number.

It is an amenable number.

660526025 is a deficient number, since it is larger than the sum of its proper divisors (159351187).

660526025 is a wasteful number, since it uses less digits than its factorization.

660526025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26620 (or 26615 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 660526025 is about 25700.7008659297. The cubic root of 660526025 is about 870.8900149050.

The spelling of 660526025 in words is "six hundred sixty million, five hundred twenty-six thousand, twenty-five".