866805278115272 has 32 divisors (see below), whose sum is σ = 1626612186556800. Its totient is φ = 433042041326400.

The previous prime is 866805278115269. The next prime is 866805278115389. The reversal of 866805278115272 is 272511872508668.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 554048447 + ... + 555610737.

It is an arithmetic number, because the mean of its divisors is an integer number (50831630829900).

Almost surely, 2^{866805278115272} is an apocalyptic number.

It is an amenable number.

866805278115272 is a deficient number, since it is larger than the sum of its proper divisors (759806908441528).

866805278115272 is a wasteful number, since it uses less digits than its factorization.

866805278115272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1619957 (or 1619953 counting only the distinct ones).

The product of its (nonzero) digits is 180633600, while the sum is 68.

The spelling of 866805278115272 in words is "eight hundred sixty-six trillion, eight hundred five billion, two hundred seventy-eight million, one hundred fifteen thousand, two hundred seventy-two".