866786026370726 has 32 divisors (see below), whose sum is σ = 1673292840192000. Its totient is φ = 326815007846400.

The previous prime is 866786026370681. The next prime is 866786026370773. The reversal of 866786026370726 is 627073620687668.

It is a Smith number, since the sum of its digits (74) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90781941851 + ... + 90781951398.

It is an arithmetic number, because the mean of its divisors is an integer number (52290401256000).

Almost surely, 2^{866786026370726} is an apocalyptic number.

866786026370726 is a deficient number, since it is larger than the sum of its proper divisors (806506813821274).

866786026370726 is a wasteful number, since it uses less digits than its factorization.

866786026370726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181563893300.

The product of its (nonzero) digits is 2048385024, while the sum is 74.

The spelling of 866786026370726 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, twenty-six million, three hundred seventy thousand, seven hundred twenty-six".