26689577220066 has 16 divisors (see below), whose sum is σ = 53380402509024. Its totient is φ = 8896317728544.

The previous prime is 26689577220041. The next prime is 26689577220077. The reversal of 26689577220066 is 66002277598662.

It is a junction number, because it is equal to n+sod(n) for n = 26689577219979 and 26689577220006.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51724755 + ... + 52238198.

It is an arithmetic number, because the mean of its divisors is an integer number (3336275156814).

Almost surely, 2^{26689577220066} is an apocalyptic number.

26689577220066 is an abundant number, since it is smaller than the sum of its proper divisors (26690825288958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26689577220066 is a wasteful number, since it uses less digits than its factorization.

26689577220066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104005745.

The product of its (nonzero) digits is 182891520, while the sum is 66.

The spelling of 26689577220066 in words is "twenty-six trillion, six hundred eighty-nine billion, five hundred seventy-seven million, two hundred twenty thousand, sixty-six".