665434358187 has 8 divisors (see below), whose sum is σ = 887894862336. Its totient is φ = 443298379752.

The previous prime is 665434358143. The next prime is 665434358201. The reversal of 665434358187 is 781853434566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 665434358187 - 2⁷ = 665434358059 is a prime.

It is a super-2 number, since 2×665434358187² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 665434358187.

It is not an unprimeable number, because it can be changed into a prime (665434358287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81126643 + ... + 81134844.

It is an arithmetic number, because the mean of its divisors is an integer number (110986857792).

Almost surely, 2^665434358187 is an apocalyptic number.

665434358187 is a deficient number, since it is larger than the sum of its proper divisors (222460504149).

665434358187 is a wasteful number, since it uses less digits than its factorization.

665434358187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162262857.

The product of its digits is 58060800, while the sum is 60.

The spelling of 665434358187 in words is "six hundred sixty-five billion, four hundred thirty-four million, three hundred fifty-eight thousand, one hundred eighty-seven".