2166070072469 has 2 divisors, whose sum is σ = 2166070072470. Its totient is φ = 2166070072468.

The previous prime is 2166070072451. The next prime is 2166070072483. The reversal of 2166070072469 is 9642700706612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2060631540100 + 105438532369 = 1435490^2 + 324713^2 .

It is a cyclic number.

It is not a de Polignac number, because 2166070072469 - 2¹² = 2166070068373 is a prime.

It is a super-2 number, since 2×2166070072469² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2166070077469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083035036234 + 1083035036235.

It is an arithmetic number, because the mean of its divisors is an integer number (1083035036235).

Almost surely, 2^{2166070072469} is an apocalyptic number.

It is an amenable number.

2166070072469 is a deficient number, since it is larger than the sum of its proper divisors (1).

2166070072469 is an equidigital number, since it uses as much as digits as its factorization.

2166070072469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1524096, while the sum is 50.

The spelling of 2166070072469 in words is "two trillion, one hundred sixty-six billion, seventy million, seventy-two thousand, four hundred sixty-nine".