26809502166 has 12 divisors (see below), whose sum is σ = 58087254732. Its totient is φ = 8936500716.

The previous prime is 26809502131. The next prime is 26809502171. The reversal of 26809502166 is 66120590862.

26809502166 is a `hidden beast` number, since 2 + 6 + 80 + 9 + 502 + 1 + 66 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 744708376 + ... + 744708411.

It is an arithmetic number, because the mean of its divisors is an integer number (4840604561).

Almost surely, 2^26809502166 is an apocalyptic number.

26809502166 is an abundant number, since it is smaller than the sum of its proper divisors (31277752566).

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

26809502166 is a wasteful number, since it uses less digits than its factorization.

26809502166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1489416795 (or 1489416792 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 26809502166 in words is "twenty-six billion, eight hundred nine million, five hundred two thousand, one hundred sixty-six".