9666669 has 4 divisors (see below), whose sum is σ = 12888896. Its totient is φ = 6444444.

The previous prime is 9666661. The next prime is 9666689.

9666669 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 9666669 - 2³ = 9666661 is a prime.

It is a super-2 number, since 2×9666669² = 186888979111122, which contains 22 as substring.

It is a Duffinian number.

9666669 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9666661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1611109 + ... + 1611114.

It is an arithmetic number, because the mean of its divisors is an integer number (3222224).

Almost surely, 2^9666669 is an apocalyptic number.

It is an amenable number.

9666669 is a deficient number, since it is larger than the sum of its proper divisors (3222227).

9666669 is a wasteful number, since it uses less digits than its factorization.

9666669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3222226.

The product of its digits is 629856, while the sum is 48.

The square root of 9666669 is about 3109.1267262690. The cubic root of 9666669 is about 213.0225680864.

The spelling of 9666669 in words is "nine million, six hundred sixty-six thousand, six hundred sixty-nine".