665628144 has 40 divisors (see below), whose sum is σ = 1722663552. Its totient is φ = 221472960.

The previous prime is 665628137. The next prime is 665628151. The reversal of 665628144 is 441826566.

It is an interprime number because it is at equal distance from previous prime (665628137) and next prime (665628151).

It is a junction number, because it is equal to n+sod(n) for n = 665628096 and 665628105.

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 7 ways as a sum of consecutive naturals, for example, 14709 + ... + 39339.

Almost surely, 2^665628144 is an apocalyptic number.

It is an amenable number.

665628144 is an abundant number, since it is smaller than the sum of its proper divisors (1057035408).

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

665628144 is a wasteful number, since it uses less digits than its factorization.

665628144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25205 (or 25199 counting only the distinct ones).

The product of its digits is 276480, while the sum is 42.

The square root of 665628144 is about 25799.7702315350. The cubic root of 665628144 is about 873.1266124298.

The spelling of 665628144 in words is "six hundred sixty-five million, six hundred twenty-eight thousand, one hundred forty-four".