2666816023 has 2 divisors, whose sum is σ = 2666816024. Its totient is φ = 2666816022.

The previous prime is 2666816021. The next prime is 2666816069. The reversal of 2666816023 is 3206186662.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2666816023 - 2¹ = 2666816021 is a prime.

It is a super-2 number, since 2×2666816023² = 14223815401059073058, which contains 22 as substring.

Together with 2666816021, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2666816021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1333408011 + 1333408012.

It is an arithmetic number, because the mean of its divisors is an integer number (1333408012).

Almost surely, 2^2666816023 is an apocalyptic number.

2666816023 is a deficient number, since it is larger than the sum of its proper divisors (1).

2666816023 is an equidigital number, since it uses as much as digits as its factorization.

2666816023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 2666816023 is about 51641.2240656629. The cubic root of 2666816023 is about 1386.7484376923.

The spelling of 2666816023 in words is "two billion, six hundred sixty-six million, eight hundred sixteen thousand, twenty-three".