123631666 has 8 divisors (see below), whose sum is σ = 185577984. Its totient is φ = 61772340.

The previous prime is 123631637. The next prime is 123631699. The reversal of 123631666 is 666136321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18070 + ... + 23953.

It is an arithmetic number, because the mean of its divisors is an integer number (23197248).

Almost surely, 2^123631666 is an apocalyptic number.

123631666 is a deficient number, since it is larger than the sum of its proper divisors (61946318).

123631666 is a wasteful number, since it uses less digits than its factorization.

123631666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43496.

The product of its digits is 23328, while the sum is 34.

The square root of 123631666 is about 11118.9777407817. The cubic root of 123631666 is about 498.1688566816.

Adding to 123631666 its reverse (666136321), we get a palindrome (789767987).

The spelling of 123631666 in words is "one hundred twenty-three million, six hundred thirty-one thousand, six hundred sixty-six".