665255445 has 32 divisors (see below), whose sum is σ = 1093201920. Its totient is φ = 345334080.

The previous prime is 665255431. The next prime is 665255467. The reversal of 665255445 is 544552566.

It is a happy number.

It is not a de Polignac number, because 665255445 - 2⁴ = 665255429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 665255397 and 665255406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80182 + ... + 88088.

It is an arithmetic number, because the mean of its divisors is an integer number (34162560).

Almost surely, 2^665255445 is an apocalyptic number.

It is an amenable number.

665255445 is a deficient number, since it is larger than the sum of its proper divisors (427946475).

665255445 is a wasteful number, since it uses less digits than its factorization.

665255445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8065.

The product of its digits is 720000, while the sum is 42.

The square root of 665255445 is about 25792.5463070244. The cubic root of 665255445 is about 872.9636214403.

The spelling of 665255445 in words is "six hundred sixty-five million, two hundred fifty-five thousand, four hundred forty-five".