123606666 has 48 divisors (see below), whose sum is σ = 285829440. Its totient is φ = 38491200.

The previous prime is 123606631. The next prime is 123606667. The reversal of 123606666 is 666606321.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 123606666.

It is not an unprimeable number, because it can be changed into a prime (123606667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22491 + ... + 27441.

It is an arithmetic number, because the mean of its divisors is an integer number (5954780).

Almost surely, 2^123606666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123606666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142914720).

123606666 is an abundant number, since it is smaller than the sum of its proper divisors (162222774).

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

123606666 is a wasteful number, since it uses less digits than its factorization.

123606666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5051 (or 5048 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 123606666 is about 11117.8534798764. The cubic root of 123606666 is about 498.1352755844.

The spelling of 123606666 in words is "one hundred twenty-three million, six hundred six thousand, six hundred sixty-six".