966989669 has 4 divisors (see below), whose sum is σ = 971898444. Its totient is φ = 962080896.

The previous prime is 966989663. The next prime is 966989693.

966989669 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 484660225 + 482329444 = 22015^2 + 21962^2 .

It is a cyclic number.

It is not a de Polignac number, because 966989669 - 2²⁴ = 950212453 is a prime.

It is a super-2 number, since 2×966989669² = 1870138039905459122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 966989599 and 966989608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (966989663) 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, 2454092 + ... + 2454485.

It is an arithmetic number, because the mean of its divisors is an integer number (242974611).

Almost surely, 2^966989669 is an apocalyptic number.

It is an amenable number.

966989669 is a deficient number, since it is larger than the sum of its proper divisors (4908775).

966989669 is a wasteful number, since it uses less digits than its factorization.

966989669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4908774.

The product of its digits is 68024448, while the sum is 68.

The square root of 966989669 is about 31096.4574992072. The cubic root of 966989669 is about 988.8732100648.

The spelling of 966989669 in words is "nine hundred sixty-six million, nine hundred eighty-nine thousand, six hundred sixty-nine".