16660777279 has 2 divisors, whose sum is σ = 16660777280. Its totient is φ = 16660777278.

The previous prime is 16660777277. The next prime is 16660777313. The reversal of 16660777279 is 97277706661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16660777279 - 2¹ = 16660777277 is a prime.

Together with 16660777277, 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 (16660777271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8330388639 + 8330388640.

It is an arithmetic number, because the mean of its divisors is an integer number (8330388640).

Almost surely, 2^16660777279 is an apocalyptic number.

16660777279 is a deficient number, since it is larger than the sum of its proper divisors (1).

16660777279 is an equidigital number, since it uses as much as digits as its factorization.

16660777279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9335088, while the sum is 58.

The spelling of 16660777279 in words is "sixteen billion, six hundred sixty million, seven hundred seventy-seven thousand, two hundred seventy-nine".