12166973479 has 2 divisors, whose sum is σ = 12166973480. Its totient is φ = 12166973478.

The previous prime is 12166973471. The next prime is 12166973509. The reversal of 12166973479 is 97437966121.

It is a weak prime.

It is an emirp because it is prime and its reverse (97437966121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12166973479 - 2³ = 12166973471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12166973471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6083486739 + 6083486740.

It is an arithmetic number, because the mean of its divisors is an integer number (6083486740).

Almost surely, 2^12166973479 is an apocalyptic number.

12166973479 is a deficient number, since it is larger than the sum of its proper divisors (1).

12166973479 is an equidigital number, since it uses as much as digits as its factorization.

12166973479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3429216, while the sum is 55.

The spelling of 12166973479 in words is "twelve billion, one hundred sixty-six million, nine hundred seventy-three thousand, four hundred seventy-nine".