663934225 has 12 divisors (see below), whose sum is σ = 823648176. Its totient is φ = 530908880.

The previous prime is 663934211. The next prime is 663934231. The reversal of 663934225 is 522439366.

It is not a de Polignac number, because 663934225 - 2⁷ = 663934097 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69594 + ... + 78556.

It is an arithmetic number, because the mean of its divisors is an integer number (68637348).

Almost surely, 2^663934225 is an apocalyptic number.

It is an amenable number.

663934225 is a deficient number, since it is larger than the sum of its proper divisors (159713951).

663934225 is a wasteful number, since it uses less digits than its factorization.

663934225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11936 (or 11931 counting only the distinct ones).

The product of its digits is 233280, while the sum is 40.

The square root of 663934225 is about 25766.9211393212. The cubic root of 663934225 is about 872.3853265929.

The spelling of 663934225 in words is "six hundred sixty-three million, nine hundred thirty-four thousand, two hundred twenty-five".