64445266 has 12 divisors (see below), whose sum is σ = 102689658. Its totient is φ = 30326912.

The previous prime is 64445263. The next prime is 64445291. The reversal of 64445266 is 66254446.

It can be written as a sum of positive squares in 3 ways, for example, as 62742241 + 1703025 = 7921^2 + 1305^2 .

It is not an unprimeable number, because it can be changed into a prime (64445263) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55171 + ... + 56326.

Almost surely, 2^64445266 is an apocalyptic number.

64445266 is a deficient number, since it is larger than the sum of its proper divisors (38244392).

64445266 is a wasteful number, since it uses less digits than its factorization.

64445266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111533 (or 111516 counting only the distinct ones).

The product of its digits is 138240, while the sum is 37.

The square root of 64445266 is about 8027.7808888883. The cubic root of 64445266 is about 400.9254944983.

The spelling of 64445266 in words is "sixty-four million, four hundred forty-five thousand, two hundred sixty-six".