966646669 has 4 divisors (see below), whose sum is σ = 972234396. Its totient is φ = 961058944.

The previous prime is 966646663. The next prime is 966646693.

966646669 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 473584644 + 493062025 = 21762^2 + 22205^2 .

It is a cyclic number.

It is not a de Polignac number, because 966646669 - 2¹⁷ = 966515597 is a prime.

It is a super-2 number, since 2×966646669² = 1868811565377591122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (966646663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2793604 + ... + 2793949.

It is an arithmetic number, because the mean of its divisors is an integer number (243058599).

Almost surely, 2^966646669 is an apocalyptic number.

It is an amenable number.

966646669 is a deficient number, since it is larger than the sum of its proper divisors (5587727).

966646669 is a wasteful number, since it uses less digits than its factorization.

966646669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5587726.

The product of its digits is 15116544, while the sum is 58.

The square root of 966646669 is about 31090.9419123963. The cubic root of 966646669 is about 988.7562754744.

The spelling of 966646669 in words is "nine hundred sixty-six million, six hundred forty-six thousand, six hundred sixty-nine".