665660183 has 2 divisors, whose sum is σ = 665660184. Its totient is φ = 665660182.

The previous prime is 665660159. The next prime is 665660197. The reversal of 665660183 is 381066566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 665660183 - 2⁶ = 665660119 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 665660183.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665660123) 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 as a sum of consecutive naturals, namely, 332830091 + 332830092.

It is an arithmetic number, because the mean of its divisors is an integer number (332830092).

Almost surely, 2^665660183 is an apocalyptic number.

665660183 is a deficient number, since it is larger than the sum of its proper divisors (1).

665660183 is an equidigital number, since it uses as much as digits as its factorization.

665660183 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 665660183 is about 25800.3911404459. The cubic root of 665660183 is about 873.1406210796.

The spelling of 665660183 in words is "six hundred sixty-five million, six hundred sixty thousand, one hundred eighty-three".