123606215666 has 16 divisors (see below), whose sum is σ = 186154203456. Its totient is φ = 61555218576.

The previous prime is 123606215657. The next prime is 123606215669. The reversal of 123606215666 is 666512606321.

123606215666 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (123606215669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 515180 + ... + 715976.

It is an arithmetic number, because the mean of its divisors is an integer number (11634637716).

Almost surely, 2^123606215666 is an apocalyptic number.

123606215666 is a deficient number, since it is larger than the sum of its proper divisors (62547987790).

123606215666 is a wasteful number, since it uses less digits than its factorization.

123606215666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202033.

The product of its (nonzero) digits is 466560, while the sum is 44.

The spelling of 123606215666 in words is "one hundred twenty-three billion, six hundred six million, two hundred fifteen thousand, six hundred sixty-six".