525663 has 8 divisors (see below), whose sum is σ = 778800. Its totient is φ = 350424.

The previous prime is 525649. The next prime is 525671. The reversal of 525663 is 366525.

It is not a de Polignac number, because 525663 - 2⁶ = 525599 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 19469 = 525663 / (5 + 2 + 5 + 6 + 6 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9708 + ... + 9761.

It is an arithmetic number, because the mean of its divisors is an integer number (97350).

2⁵²⁵⁶⁶³ is an apocalyptic number.

525663 is a deficient number, since it is larger than the sum of its proper divisors (253137).

525663 is a wasteful number, since it uses less digits than its factorization.

525663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19478 (or 19472 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 525663 is about 725.0262064229. The cubic root of 525663 is about 80.7053768477.

The spelling of 525663 in words is "five hundred twenty-five thousand, six hundred sixty-three".