664276450 has 12 divisors (see below), whose sum is σ = 1235554290. Its totient is φ = 265710560.

The previous prime is 664276447. The next prime is 664276511. The reversal of 664276450 is 54672466.

It can be written as a sum of positive squares in 3 ways, for example, as 576048001 + 88228449 = 24001^2 + 9393^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6642715 + ... + 6642814.

Almost surely, 2^664276450 is an apocalyptic number.

664276450 is a deficient number, since it is larger than the sum of its proper divisors (571277840).

664276450 is a wasteful number, since it uses less digits than its factorization.

664276450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13285541 (or 13285536 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 40.

The square root of 664276450 is about 25773.5610655571. The cubic root of 664276450 is about 872.5351912309.

The spelling of 664276450 in words is "six hundred sixty-four million, two hundred seventy-six thousand, four hundred fifty".