866472655074256 has 20 divisors (see below), whose sum is σ = 1717832415003232. Its totient is φ = 423161064105696.

The previous prime is 866472655074193. The next prime is 866472655074269. The reversal of 866472655074256 is 652470556274668.

It is a super-2 number, since 2×866472655074256² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 629703963756 + ... + 629703965131.

Almost surely, 2^{866472655074256} is an apocalyptic number.

866472655074256 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

It is an amenable number.

866472655074256 is a deficient number, since it is larger than the sum of its proper divisors (851359759928976).

866472655074256 is a wasteful number, since it uses less digits than its factorization.

866472655074256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259407928938 (or 1259407928932 counting only the distinct ones).

The product of its (nonzero) digits is 4064256000, while the sum is 73.

The spelling of 866472655074256 in words is "eight hundred sixty-six trillion, four hundred seventy-two billion, six hundred fifty-five million, seventy-four thousand, two hundred fifty-six".