660253404 has 12 divisors (see below), whose sum is σ = 1540591304. Its totient is φ = 220084464.

The previous prime is 660253397. The next prime is 660253417. The reversal of 660253404 is 404352066.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27510547 + ... + 27510570.

Almost surely, 2^660253404 is an apocalyptic number.

It is an amenable number.

660253404 is an abundant number, since it is smaller than the sum of its proper divisors (880337900).

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

660253404 is a wasteful number, since it uses less digits than its factorization.

660253404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55021124 (or 55021122 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 660253404 is about 25695.3965526901. The cubic root of 660253404 is about 870.7701833519.

It can be divided in two parts, 6602 and 53404, that added together give a palindrome (60006).

The spelling of 660253404 in words is "six hundred sixty million, two hundred fifty-three thousand, four hundred four".