123955866 has 16 divisors (see below), whose sum is σ = 275457600. Its totient is φ = 41318604.

The previous prime is 123955849. The next prime is 123955877. The reversal of 123955866 is 668559321.

123955866 is a `hidden beast` number, since 1 + 2 + 39 + 558 + 66 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1147686 + ... + 1147793.

It is an arithmetic number, because the mean of its divisors is an integer number (17216100).

Almost surely, 2^123955866 is an apocalyptic number.

123955866 is an abundant number, since it is smaller than the sum of its proper divisors (151501734).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123955866 is a wasteful number, since it uses less digits than its factorization.

123955866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2295490 (or 2295484 counting only the distinct ones).

The product of its digits is 388800, while the sum is 45.

The square root of 123955866 is about 11133.5468741996. The cubic root of 123955866 is about 498.6039269212.

The spelling of 123955866 in words is "one hundred twenty-three million, nine hundred fifty-five thousand, eight hundred sixty-six".