669854458966 has 32 divisors (see below), whose sum is σ = 1265117978880. Its totient is φ = 258398268000.

The previous prime is 669854458919. The next prime is 669854458969.

669854458966 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 669854458892 and 669854458901.

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, 21517636 + ... + 21548743.

It is an arithmetic number, because the mean of its divisors is an integer number (39534936840).

Almost surely, 2^669854458966 is an apocalyptic number.

669854458966 is a deficient number, since it is larger than the sum of its proper divisors (595263519914).

669854458966 is a wasteful number, since it uses less digits than its factorization.

669854458966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43066500.

The product of its digits is 2687385600, while the sum is 76.

The spelling of 669854458966 in words is "six hundred sixty-nine billion, eight hundred fifty-four million, four hundred fifty-eight thousand, nine hundred sixty-six".