520660066025 has 24 divisors (see below), whose sum is σ = 734933300544. Its totient is φ = 362198302400.

The previous prime is 520660066007. The next prime is 520660066027.

520660066025 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 520660066025 - 2²⁸ = 520391630569 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 520660066025.

It is not an unprimeable number, because it can be changed into a prime (520660066027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41152574 + ... + 41165223.

It is an arithmetic number, because the mean of its divisors is an integer number (30622220856).

Almost surely, 2^520660066025 is an apocalyptic number.

520660066025 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

520660066025 is a deficient number, since it is larger than the sum of its proper divisors (214273234519).

520660066025 is a wasteful number, since it uses less digits than its factorization.

520660066025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82317841 (or 82317836 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 38.

The spelling of 520660066025 in words is "five hundred twenty billion, six hundred sixty million, sixty-six thousand, twenty-five".