665772036189 has 16 divisors (see below), whose sum is σ = 955999367232. Its totient is φ = 409697722368.

The previous prime is 665772036157. The next prime is 665772036199. The reversal of 665772036189 is 981630277566.

It is not a de Polignac number, because 665772036189 - 2⁵ = 665772036157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665772036199) 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 15 ways as a sum of consecutive naturals, for example, 2255709 + ... + 2533725.

It is an arithmetic number, because the mean of its divisors is an integer number (59749960452).

Almost surely, 2^665772036189 is an apocalyptic number.

It is an amenable number.

665772036189 is a deficient number, since it is larger than the sum of its proper divisors (290227331043).

665772036189 is a wasteful number, since it uses less digits than its factorization.

665772036189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339436.

The product of its (nonzero) digits is 22861440, while the sum is 60.

The spelling of 665772036189 in words is "six hundred sixty-five billion, seven hundred seventy-two million, thirty-six thousand, one hundred eighty-nine".