665007385 has 16 divisors (see below), whose sum is σ = 923558400. Its totient is φ = 450230976.

The previous prime is 665007379. The next prime is 665007407. The reversal of 665007385 is 583700566.

665007385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 665007385 - 2²¹ = 662910233 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117490 + ... + 123019.

It is an arithmetic number, because the mean of its divisors is an integer number (57722400).

Almost surely, 2^665007385 is an apocalyptic number.

It is an amenable number.

665007385 is a deficient number, since it is larger than the sum of its proper divisors (258551015).

665007385 is a wasteful number, since it uses less digits than its factorization.

665007385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240600.

The product of its (nonzero) digits is 151200, while the sum is 40.

The square root of 665007385 is about 25787.7371050660. The cubic root of 665007385 is about 872.8551045899.

The spelling of 665007385 in words is "six hundred sixty-five million, seven thousand, three hundred eighty-five".