866078256 has 40 divisors (see below), whose sum is σ = 2239452400. Its totient is φ = 288423936.

The previous prime is 866078233. The next prime is 866078263. The reversal of 866078256 is 652870668.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 47520 + ... + 63168.

It is an arithmetic number, because the mean of its divisors is an integer number (55986310).

Almost surely, 2^866078256 is an apocalyptic number.

It is an amenable number.

866078256 is an abundant number, since it is smaller than the sum of its proper divisors (1373374144).

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

866078256 is a wasteful number, since it uses less digits than its factorization.

866078256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16813 (or 16807 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 48.

The square root of 866078256 is about 29429.2075326537. The cubic root of 866078256 is about 953.2036830659.

The spelling of 866078256 in words is "eight hundred sixty-six million, seventy-eight thousand, two hundred fifty-six".