525646663 has 12 divisors (see below), whose sum is σ = 556769160. Its totient is φ = 495667536.

The previous prime is 525646661. The next prime is 525646711. The reversal of 525646663 is 366646525.

It is not a de Polignac number, because 525646663 - 2¹ = 525646661 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525646661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48720 + ... + 58522.

It is an arithmetic number, because the mean of its divisors is an integer number (46397430).

Almost surely, 2^525646663 is an apocalyptic number.

525646663 is a deficient number, since it is larger than the sum of its proper divisors (31122497).

525646663 is an equidigital number, since it uses as much as digits as its factorization.

525646663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9918 (or 9875 counting only the distinct ones).

The product of its digits is 777600, while the sum is 43.

The square root of 525646663 is about 22926.9854756355. The cubic root of 525646663 is about 807.0454076235.

The spelling of 525646663 in words is "five hundred twenty-five million, six hundred forty-six thousand, six hundred sixty-three".