665341644 has 24 divisors (see below), whose sum is σ = 1693597248. Its totient is φ = 201618640.

The previous prime is 665341613. The next prime is 665341657. The reversal of 665341644 is 446143566.

665341644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 2520102 + ... + 2520365.

It is an arithmetic number, because the mean of its divisors is an integer number (70566552).

Almost surely, 2^665341644 is an apocalyptic number.

It is an amenable number.

665341644 is an abundant number, since it is smaller than the sum of its proper divisors (1028255604).

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

665341644 is a wasteful number, since it uses less digits than its factorization.

665341644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5040485 (or 5040483 counting only the distinct ones).

The product of its digits is 207360, while the sum is 39.

The square root of 665341644 is about 25794.2172589129. The cubic root of 665341644 is about 873.0013239208.

The spelling of 665341644 in words is "six hundred sixty-five million, three hundred forty-one thousand, six hundred forty-four".