866284064 has 24 divisors (see below), whose sum is σ = 1729522368. Its totient is φ = 427040320.

The previous prime is 866284061. The next prime is 866284073. The reversal of 866284064 is 460482668.

It is not an unprimeable number, because it can be changed into a prime (866284061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188372 + ... + 192915.

It is an arithmetic number, because the mean of its divisors is an integer number (72063432).

Almost surely, 2^866284064 is an apocalyptic number.

It is an amenable number.

866284064 is a deficient number, since it is larger than the sum of its proper divisors (863238304).

866284064 is a wasteful number, since it uses less digits than its factorization.

866284064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381368 (or 381360 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 44.

The square root of 866284064 is about 29432.7039872316. The cubic root of 866284064 is about 953.2791810189.

The spelling of 866284064 in words is "eight hundred sixty-six million, two hundred eighty-four thousand, sixty-four".