2166724814959 has 2 divisors, whose sum is σ = 2166724814960. Its totient is φ = 2166724814958.

The previous prime is 2166724814929. The next prime is 2166724815023. The reversal of 2166724814959 is 9594184276612.

It is an a-pointer prime, because the next prime (2166724815023) can be obtained adding 2166724814959 to its sum of digits (64).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2166724814959 - 2¹³ = 2166724806767 is a prime.

It is a super-2 number, since 2×2166724814959² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2166724814959.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2166724814929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083362407479 + 1083362407480.

It is an arithmetic number, because the mean of its divisors is an integer number (1083362407480).

Almost surely, 2^{2166724814959} is an apocalyptic number.

2166724814959 is a deficient number, since it is larger than the sum of its proper divisors (1).

2166724814959 is an equidigital number, since it uses as much as digits as its factorization.

2166724814959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52254720, while the sum is 64.

The spelling of 2166724814959 in words is "two trillion, one hundred sixty-six billion, seven hundred twenty-four million, eight hundred fourteen thousand, nine hundred fifty-nine".