664126225 has 12 divisors (see below), whose sum is σ = 941161984. Its totient is φ = 455400720.

The previous prime is 664126201. The next prime is 664126259. The reversal of 664126225 is 522621466.

It is a de Polignac number, because none of the positive numbers 2^k-664126225 is a prime.

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, 1897329 + ... + 1897678.

Almost surely, 2^664126225 is an apocalyptic number.

It is an amenable number.

664126225 is a deficient number, since it is larger than the sum of its proper divisors (277035759).

664126225 is a wasteful number, since it uses less digits than its factorization.

664126225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3795024 (or 3795019 counting only the distinct ones).

The product of its digits is 34560, while the sum is 34.

The square root of 664126225 is about 25770.6465770652. The cubic root of 664126225 is about 872.4694121509.

The spelling of 664126225 in words is "six hundred sixty-four million, one hundred twenty-six thousand, two hundred twenty-five".