266109686825 has 24 divisors (see below), whose sum is σ = 336344618400. Its totient is φ = 208795656960.

The previous prime is 266109686819. The next prime is 266109686837. The reversal of 266109686825 is 528686901662.

It is not a de Polignac number, because 266109686825 - 2⁶ = 266109686761 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 430346 + ... + 847004.

It is an arithmetic number, because the mean of its divisors is an integer number (14014359100).

Almost surely, 2^266109686825 is an apocalyptic number.

266109686825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

266109686825 is a deficient number, since it is larger than the sum of its proper divisors (70234931575).

266109686825 is a wasteful number, since it uses less digits than its factorization.

266109686825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417161 (or 417156 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 59.

The spelling of 266109686825 in words is "two hundred sixty-six billion, one hundred nine million, six hundred eighty-six thousand, eight hundred twenty-five".