23566664666 has 4 divisors (see below), whose sum is σ = 35349997002. Its totient is φ = 11783332332.

The previous prime is 23566664651. The next prime is 23566664699. The reversal of 23566664666 is 66646666532.

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

It can be written as a sum of positive squares in only one way, i.e., 22794658441 + 772006225 = 150979^2 + 27785^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5891666165 + ... + 5891666168.

Almost surely, 2^23566664666 is an apocalyptic number.

23566664666 is a deficient number, since it is larger than the sum of its proper divisors (11783332336).

23566664666 is a wasteful number, since it uses less digits than its factorization.

23566664666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11783332335.

The product of its digits is 33592320, while the sum is 56.

The spelling of 23566664666 in words is "twenty-three billion, five hundred sixty-six million, six hundred sixty-four thousand, six hundred sixty-six".