664110250 has 16 divisors (see below), whose sum is σ = 1243214856. Its totient is φ = 265644000.

The previous prime is 664110221. The next prime is 664110277. The reversal of 664110250 is 52011466.

It can be written as a sum of positive squares in 4 ways, for example, as 378263601 + 285846649 = 19449^2 + 16907^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1327971 + ... + 1328470.

Almost surely, 2^664110250 is an apocalyptic number.

664110250 is a deficient number, since it is larger than the sum of its proper divisors (579104606).

664110250 is a wasteful number, since it uses less digits than its factorization.

664110250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2656458 (or 2656448 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 664110250 is about 25770.3366295437. The cubic root of 664110250 is about 872.4624165878.

The spelling of 664110250 in words is "six hundred sixty-four million, one hundred ten thousand, two hundred fifty".