663194125 has 16 divisors (see below), whose sum is σ = 902910528. Its totient is φ = 482322000.

The previous prime is 663194113. The next prime is 663194131. The reversal of 663194125 is 521491366.

It is not a de Polignac number, because 663194125 - 2²³ = 654805517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 239787 + ... + 242536.

It is an arithmetic number, because the mean of its divisors is an integer number (56431908).

Almost surely, 2^663194125 is an apocalyptic number.

It is an amenable number.

663194125 is a deficient number, since it is larger than the sum of its proper divisors (239716403).

663194125 is a wasteful number, since it uses less digits than its factorization.

663194125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482349 (or 482339 counting only the distinct ones).

The product of its digits is 38880, while the sum is 37.

The square root of 663194125 is about 25752.5556984156. Note that the first 3 decimals coincide. The cubic root of 663194125 is about 872.0610512799.

The spelling of 663194125 in words is "six hundred sixty-three million, one hundred ninety-four thousand, one hundred twenty-five".