23123666 has 4 divisors (see below), whose sum is σ = 34685502. Its totient is φ = 11561832.

The previous prime is 23123657. The next prime is 23123677. The reversal of 23123666 is 66632132.

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., 13169641 + 9954025 = 3629^2 + 3155^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5780915 + ... + 5780918.

Almost surely, 2^23123666 is an apocalyptic number.

23123666 is a deficient number, since it is larger than the sum of its proper divisors (11561836).

23123666 is a wasteful number, since it uses less digits than its factorization.

23123666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11561835.

The product of its digits is 7776, while the sum is 29.

The square root of 23123666 is about 4808.7073107021. The cubic root of 23123666 is about 284.8954823481.

Adding to 23123666 its reverse (66632132), we get a palindrome (89755798).

The spelling of 23123666 in words is "twenty-three million, one hundred twenty-three thousand, six hundred sixty-six".