23555666 has 4 divisors (see below), whose sum is σ = 35333502. Its totient is φ = 11777832.

The previous prime is 23555621. The next prime is 23555683. The reversal of 23555666 is 66655532.

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., 20566225 + 2989441 = 4535^2 + 1729^2 .

It is a Curzon number.

It is a plaindrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5888915 + ... + 5888918.

Almost surely, 2^23555666 is an apocalyptic number.

23555666 is a deficient number, since it is larger than the sum of its proper divisors (11777836).

23555666 is a wasteful number, since it uses less digits than its factorization.

23555666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11777835.

The product of its digits is 162000, while the sum is 38.

The square root of 23555666 is about 4853.4179708737. The cubic root of 23555666 is about 286.6587014793.

The spelling of 23555666 in words is "twenty-three million, five hundred fifty-five thousand, six hundred sixty-six".