866760686880420 has 24 divisors (see below), whose sum is σ = 2426929923265344. Its totient is φ = 231136183168096.

The previous prime is 866760686880409. The next prime is 866760686880421. The reversal of 866760686880420 is 24088686067668.

It is a super-2 number, since 2×866760686880420² (a number of 31 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (866760686880421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7223005723944 + ... + 7223005724063.

It is an arithmetic number, because the mean of its divisors is an integer number (101122080136056).

Almost surely, 2^{866760686880420} is an apocalyptic number.

It is an amenable number.

866760686880420 is an abundant number, since it is smaller than the sum of its proper divisors (1560169236384924).

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

866760686880420 is a wasteful number, since it uses less digits than its factorization.

866760686880420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14446011448019 (or 14446011448017 counting only the distinct ones).

The product of its (nonzero) digits is 1783627776, while the sum is 75.

The spelling of 866760686880420 in words is "eight hundred sixty-six trillion, seven hundred sixty billion, six hundred eighty-six million, eight hundred eighty thousand, four hundred twenty".