12265165401666 has 32 divisors (see below), whose sum is σ = 25661342775168. Its totient is φ = 3900781969920.

The previous prime is 12265165401613. The next prime is 12265165401667. The reversal of 12265165401666 is 66610456156221.

It is a super-2 number, since 2×12265165401666² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12265165401667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111882255 + ... + 111991826.

It is an arithmetic number, because the mean of its divisors is an integer number (801916961724).

Almost surely, 2^{12265165401666} is an apocalyptic number.

12265165401666 is an abundant number, since it is smaller than the sum of its proper divisors (13396177373502).

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

12265165401666 is a wasteful number, since it uses less digits than its factorization.

12265165401666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223874506.

The product of its (nonzero) digits is 3110400, while the sum is 51.

The spelling of 12265165401666 in words is "twelve trillion, two hundred sixty-five billion, one hundred sixty-five million, four hundred one thousand, six hundred sixty-six".