123885666 has 32 divisors (see below), whose sum is σ = 281709120. Its totient is φ = 40334112.

The previous prime is 123885661. The next prime is 123885673. The reversal of 123885666 is 666588321.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (123885661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24355 + ... + 28998.

It is an arithmetic number, because the mean of its divisors is an integer number (8803410).

Almost surely, 2^123885666 is an apocalyptic number.

123885666 is an abundant number, since it is smaller than the sum of its proper divisors (157823454).

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

123885666 is a wasteful number, since it uses less digits than its factorization.

123885666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53407 (or 53401 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 123885666 is about 11130.3937935726. The cubic root of 123885666 is about 498.5097842599.

The spelling of 123885666 in words is "one hundred twenty-three million, eight hundred eighty-five thousand, six hundred sixty-six".