825806663 has 16 divisors (see below), whose sum is σ = 930110496. Its totient is φ = 726589440.

The previous prime is 825806659. The next prime is 825806689. The reversal of 825806663 is 366608528.

It is a cyclic number.

It is not a de Polignac number, because 825806663 - 2² = 825806659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (825806693) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73295 + ... + 83807.

It is an arithmetic number, because the mean of its divisors is an integer number (58131906).

Almost surely, 2^825806663 is an apocalyptic number.

825806663 is a deficient number, since it is larger than the sum of its proper divisors (104303833).

825806663 is a wasteful number, since it uses less digits than its factorization.

825806663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10754.

The product of its (nonzero) digits is 414720, while the sum is 44.

The square root of 825806663 is about 28736.8520022636. The cubic root of 825806663 is about 938.1943089712.

The spelling of 825806663 in words is "eight hundred twenty-five million, eight hundred six thousand, six hundred sixty-three".