866786514020712 has 48 divisors (see below), whose sum is σ = 2347593307490340. Its totient is φ = 288923115091968.

The previous prime is 866786514020683. The next prime is 866786514020717. The reversal of 866786514020712 is 217020415687668.

866786514020712 is a `hidden beast` number, since 8 + 6 + 6 + 7 + 86 + 514 + 0 + 20 + 7 + 12 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 676442384352036 + 190344129668676 = 26008506^2 + 13796526^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 866786514020712.

It is not an unprimeable number, because it can be changed into a prime (866786514020717) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 115566363 + ... + 122837930.

Almost surely, 2^{866786514020712} is an apocalyptic number.

It is an amenable number.

866786514020712 is an abundant number, since it is smaller than the sum of its proper divisors (1480806793469628).

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

866786514020712 is a wasteful number, since it uses less digits than its factorization.

866786514020712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238454802 (or 238454795 counting only the distinct ones).

The product of its (nonzero) digits is 54190080, while the sum is 63.

The spelling of 866786514020712 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, five hundred fourteen million, twenty thousand, seven hundred twelve".