520666025 has 36 divisors (see below), whose sum is σ = 747087600. Its totient is φ = 358696800.

The previous prime is 520665991. The next prime is 520666033.

520666025 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 520666025 - 2¹⁴ = 520649641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 520665982 and 520666000.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 52946 + ... + 62004.

Almost surely, 2^520666025 is an apocalyptic number.

520666025 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

520666025 is a deficient number, since it is larger than the sum of its proper divisors (226421575).

520666025 is a wasteful number, since it uses less digits than its factorization.

520666025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9110 (or 9094 counting only the distinct ones).

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

The square root of 520666025 is about 22818.1073930333. The cubic root of 520666025 is about 804.4883262543.

The spelling of 520666025 in words is "five hundred twenty million, six hundred sixty-six thousand, twenty-five".