660253444 has 12 divisors (see below), whose sum is σ = 1155796684. Its totient is φ = 330025824.

The previous prime is 660253427. The next prime is 660253453. The reversal of 660253444 is 444352066.

It can be written as a sum of positive squares in 2 ways, for example, as 325802500 + 334450944 = 18050^2 + 18288^2 .

It is a super-2 number, since 2×660253444² = 871869220627722272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9399 + ... + 37534.

Almost surely, 2^660253444 is an apocalyptic number.

It is an amenable number.

660253444 is a deficient number, since it is larger than the sum of its proper divisors (495543240).

660253444 is a wasteful number, since it uses less digits than its factorization.

660253444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50454 (or 50452 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 34.

The square root of 660253444 is about 25695.3973310397. The cubic root of 660253444 is about 870.7702009364.

The spelling of 660253444 in words is "six hundred sixty million, two hundred fifty-three thousand, four hundred forty-four".