966666823 has 2 divisors, whose sum is σ = 966666824. Its totient is φ = 966666822.

The previous prime is 966666787. The next prime is 966666829. The reversal of 966666823 is 328666669.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-966666823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (966666829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 483333411 + 483333412.

It is an arithmetic number, because the mean of its divisors is an integer number (483333412).

Almost surely, 2^966666823 is an apocalyptic number.

966666823 is a deficient number, since it is larger than the sum of its proper divisors (1).

966666823 is an equidigital number, since it uses as much as digits as its factorization.

966666823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3359232, while the sum is 52.

The square root of 966666823 is about 31091.2660243998. The cubic root of 966666823 is about 988.7631470839.

The spelling of 966666823 in words is "nine hundred sixty-six million, six hundred sixty-six thousand, eight hundred twenty-three".