665270475 has 12 divisors (see below), whose sum is σ = 1099913976. Its totient is φ = 354810880.

The previous prime is 665270413. The next prime is 665270479. The reversal of 665270475 is 574072566.

It is not a de Polignac number, because 665270475 - 2²¹ = 663173323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (665270479) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 4435062 + ... + 4435211.

It is an arithmetic number, because the mean of its divisors is an integer number (91659498).

Almost surely, 2^665270475 is an apocalyptic number.

665270475 is a deficient number, since it is larger than the sum of its proper divisors (434643501).

665270475 is a wasteful number, since it uses less digits than its factorization.

665270475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8870286 (or 8870281 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 42.

The square root of 665270475 is about 25792.8376686242. The cubic root of 665270475 is about 872.9701956290.

The spelling of 665270475 in words is "six hundred sixty-five million, two hundred seventy thousand, four hundred seventy-five".