866786257723146 has 32 divisors (see below), whose sum is σ = 1734206850687168. Its totient is φ = 288823048550400.

The previous prime is 866786257723073. The next prime is 866786257723159. The reversal of 866786257723146 is 641327752687668.

It is a happy 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, 185404746 + ... + 190022346.

It is an arithmetic number, because the mean of its divisors is an integer number (54193964083974).

Almost surely, 2^{866786257723146} is an apocalyptic number.

866786257723146 is an abundant number, since it is smaller than the sum of its proper divisors (867420592964022).

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

866786257723146 is a wasteful number, since it uses less digits than its factorization.

866786257723146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4629046.

The product of its digits is 6827950080, while the sum is 78.

The spelling of 866786257723146 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, two hundred fifty-seven million, seven hundred twenty-three thousand, one hundred forty-six".