2166248447927 has 2 divisors, whose sum is σ = 2166248447928. Its totient is φ = 2166248447926.

The previous prime is 2166248447851. The next prime is 2166248448029. The reversal of 2166248447927 is 7297448426612.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2166248447927 - 2³⁰ = 2165174706103 is a prime.

It is a super-2 number, since 2×2166248447927² (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 2166248447927.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2166248477927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083124223963 + 1083124223964.

It is an arithmetic number, because the mean of its divisors is an integer number (1083124223964).

Almost surely, 2^{2166248447927} is an apocalyptic number.

2166248447927 is a deficient number, since it is larger than the sum of its proper divisors (1).

2166248447927 is an equidigital number, since it uses as much as digits as its factorization.

2166248447927 is an evil number, because the sum of its binary digits is even.

The product of its digits is 65028096, while the sum is 62.

The spelling of 2166248447927 in words is "two trillion, one hundred sixty-six billion, two hundred forty-eight million, four hundred forty-seven thousand, nine hundred twenty-seven".