2666688999979 has 2 divisors, whose sum is σ = 2666688999980. Its totient is φ = 2666688999978.

The previous prime is 2666688999917. The next prime is 2666689000067. The reversal of 2666688999979 is 9799998866662.

2666688999979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2666688999979 - 2¹³ = 2666688991787 is a prime.

It is a super-2 number, since 2×2666688999979² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2666688991979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1333344499989 + 1333344499990.

It is an arithmetic number, because the mean of its divisors is an integer number (1333344499990).

Almost surely, 2^{2666688999979} is an apocalyptic number.

2666688999979 is a deficient number, since it is larger than the sum of its proper divisors (1).

2666688999979 is an equidigital number, since it uses as much as digits as its factorization.

2666688999979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68568643584, while the sum is 94.

The spelling of 2666688999979 in words is "two trillion, six hundred sixty-six billion, six hundred eighty-eight million, nine hundred ninety-nine thousand, nine hundred seventy-nine".