26166861878568 has 16 divisors (see below), whose sum is σ = 65417154696480. Its totient is φ = 8722287292848.

The previous prime is 26166861878557. The next prime is 26166861878579. The reversal of 26166861878568 is 86587816866162.

It is an interprime number because it is at equal distance from previous prime (26166861878557) and next prime (26166861878579).

It is a junction number, because it is equal to n+sod(n) for n = 26166861878493 and 26166861878502.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 545142955780 + ... + 545142955827.

It is an arithmetic number, because the mean of its divisors is an integer number (4088572168530).

Almost surely, 2^{26166861878568} is an apocalyptic number.

It is an amenable number.

26166861878568 is an abundant number, since it is smaller than the sum of its proper divisors (39250292817912).

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

26166861878568 is a wasteful number, since it uses less digits than its factorization.

26166861878568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090285911616 (or 1090285911612 counting only the distinct ones).

The product of its digits is 2229534720, while the sum is 78.

The spelling of 26166861878568 in words is "twenty-six trillion, one hundred sixty-six billion, eight hundred sixty-one million, eight hundred seventy-eight thousand, five hundred sixty-eight".