664225450 has 24 divisors (see below), whose sum is σ = 1411954272. Its totient is φ = 227734320.

The previous prime is 664225439. The next prime is 664225453. The reversal of 664225450 is 54522466.

It is not an unprimeable number, because it can be changed into a prime (664225453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 948544 + ... + 949243.

It is an arithmetic number, because the mean of its divisors is an integer number (58831428).

Almost surely, 2^664225450 is an apocalyptic number.

664225450 is an abundant number, since it is smaller than the sum of its proper divisors (747728822).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664225450 is a wasteful number, since it uses less digits than its factorization.

664225450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1897806 (or 1897801 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 34.

The square root of 664225450 is about 25772.5716605852. The cubic root of 664225450 is about 872.5128609528.

The spelling of 664225450 in words is "six hundred sixty-four million, two hundred twenty-five thousand, four hundred fifty".