669854458965 has 16 divisors (see below), whose sum is σ = 1071940232448. Its totient is φ = 357198012096.

The previous prime is 669854458919. The next prime is 669854458969. The reversal of 669854458965 is 569854458966.

It is not a de Polignac number, because 669854458965 - 2²² = 669850264661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669854458969) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3510157 + ... + 3696066.

It is an arithmetic number, because the mean of its divisors is an integer number (66996264528).

Almost surely, 2^669854458965 is an apocalyptic number.

It is an amenable number.

669854458965 is a deficient number, since it is larger than the sum of its proper divisors (402085773483).

669854458965 is a wasteful number, since it uses less digits than its factorization.

669854458965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7212428.

The product of its digits is 2239488000, while the sum is 75.

Subtracting from 669854458965 its reverse (569854458966), we obtain a palindrome (99999999999).

The spelling of 669854458965 in words is "six hundred sixty-nine billion, eight hundred fifty-four million, four hundred fifty-eight thousand, nine hundred sixty-five".