123863666 has 12 divisors (see below), whose sum is σ = 197368458. Its totient is φ = 58288512.

The previous prime is 123863657. The next prime is 123863713. The reversal of 123863666 is 666368321.

It can be written as a sum of positive squares in 3 ways, for example, as 123854641 + 9025 = 11129^2 + 95^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 106571 + ... + 107726.

Almost surely, 2^123863666 is an apocalyptic number.

123863666 is a deficient number, since it is larger than the sum of its proper divisors (73504792).

123863666 is a wasteful number, since it uses less digits than its factorization.

123863666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214333 (or 214316 counting only the distinct ones).

The product of its digits is 186624, while the sum is 41.

The square root of 123863666 is about 11129.4054648036. The cubic root of 123863666 is about 498.4802735429.

The spelling of 123863666 in words is "one hundred twenty-three million, eight hundred sixty-three thousand, six hundred sixty-six".