665427195 has 12 divisors (see below), whose sum is σ = 1153407216. Its totient is φ = 354894480.

The previous prime is 665427187. The next prime is 665427247. The reversal of 665427195 is 591724566.

It is not a de Polignac number, because 665427195 - 2³ = 665427187 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 14787271 = 665427195 / (6 + 6 + 5 + 4 + 2 + 7 + 1 + 9 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 665427195.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7393591 + ... + 7393680.

It is an arithmetic number, because the mean of its divisors is an integer number (96117268).

Almost surely, 2^665427195 is an apocalyptic number.

665427195 is a deficient number, since it is larger than the sum of its proper divisors (487980021).

665427195 is a wasteful number, since it uses less digits than its factorization.

665427195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14787282 (or 14787279 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The square root of 665427195 is about 25795.8755424196. The cubic root of 665427195 is about 873.0387397538.

It can be divided in two parts, 66542 and 7195, that added together give a palindrome (73737).

The spelling of 665427195 in words is "six hundred sixty-five million, four hundred twenty-seven thousand, one hundred ninety-five".