12166604965 has 16 divisors (see below), whose sum is σ = 15462066672. Its totient is φ = 9158769664.

The previous prime is 12166604941. The next prime is 12166604977. The reversal of 12166604965 is 56940666121.

It can be written as a sum of positive squares in 8 ways, for example, as 161239204 + 12005365761 = 12698^2 + 109569^2 .

It is a cyclic number.

It is not a de Polignac number, because 12166604965 - 2⁹ = 12166604453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 473427 + ... + 498463.

It is an arithmetic number, because the mean of its divisors is an integer number (966379167).

Almost surely, 2^12166604965 is an apocalyptic number.

It is an amenable number.

12166604965 is a deficient number, since it is larger than the sum of its proper divisors (3295461707).

12166604965 is a wasteful number, since it uses less digits than its factorization.

12166604965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30776.

The product of its (nonzero) digits is 466560, while the sum is 46.

The spelling of 12166604965 in words is "twelve billion, one hundred sixty-six million, six hundred four thousand, nine hundred sixty-five".