23081666 has 4 divisors (see below), whose sum is σ = 34622502. Its totient is φ = 11540832.

The previous prime is 23081657. The next prime is 23081677. The reversal of 23081666 is 66618032.

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., 22762441 + 319225 = 4771^2 + 565^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5770415 + ... + 5770418.

Almost surely, 2^23081666 is an apocalyptic number.

23081666 is a deficient number, since it is larger than the sum of its proper divisors (11540836).

23081666 is a wasteful number, since it uses less digits than its factorization.

23081666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11540835.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 23081666 is about 4804.3382478756. The cubic root of 23081666 is about 284.7228905967.

Adding to 23081666 its reverse (66618032), we get a palindrome (89699698).

The spelling of 23081666 in words is "twenty-three million, eighty-one thousand, six hundred sixty-six".