665003445 has 16 divisors (see below), whose sum is σ = 1067478720. Its totient is φ = 353510784.

The previous prime is 665003411. The next prime is 665003459. The reversal of 665003445 is 544300566.

It is not a de Polignac number, because 665003445 - 2⁸ = 665003189 is a prime.

It is a Curzon number.

It is a congruent number.

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, 67600 + ... + 76809.

It is an arithmetic number, because the mean of its divisors is an integer number (66717420).

Almost surely, 2^665003445 is an apocalyptic number.

It is an amenable number.

665003445 is a deficient number, since it is larger than the sum of its proper divisors (402475275).

665003445 is a wasteful number, since it uses less digits than its factorization.

665003445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144724.

The product of its (nonzero) digits is 43200, while the sum is 33.

The square root of 665003445 is about 25787.6607120537. The cubic root of 665003445 is about 872.8533807715.

The spelling of 665003445 in words is "six hundred sixty-five million, three thousand, four hundred forty-five".