664022250 has 96 divisors (see below), whose sum is σ = 1802348496. Its totient is φ = 176400000.

The previous prime is 664022231. The next prime is 664022269. The reversal of 664022250 is 52220466.

664022250 is a `hidden beast` number, since 6 + 6 + 402 + 2 + 250 = 666.

664022250 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (664022231) and next prime (664022269).

It can be written as a sum of positive squares in 8 ways, for example, as 393129 + 663629121 = 627^2 + 25761^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 946900 + ... + 947600.

Almost surely, 2^664022250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 664022250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (901174248).

664022250 is an abundant number, since it is smaller than the sum of its proper divisors (1138326246).

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

664022250 is a wasteful number, since it uses less digits than its factorization.

664022250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1145 (or 1132 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 664022250 is about 25768.6291835635. The cubic root of 664022250 is about 872.4238787677.

The spelling of 664022250 in words is "six hundred sixty-four million, twenty-two thousand, two hundred fifty".