866464 has 12 divisors (see below), whose sum is σ = 1705914. Its totient is φ = 433216.

The previous prime is 866461. The next prime is 866471. The reversal of 866464 is 464668.

It can be written as a sum of positive squares in only one way, i.e., 608400 + 258064 = 780^2 + 508^2 .

It is not an unprimeable number, because it can be changed into a prime (866461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13507 + ... + 13570.

2⁸⁶⁶⁴⁶⁴ is an apocalyptic number.

It is an amenable number.

866464 is a deficient number, since it is larger than the sum of its proper divisors (839450).

866464 is a wasteful number, since it uses less digits than its factorization.

866464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27087 (or 27079 counting only the distinct ones).

The product of its digits is 27648, while the sum is 34.

The square root of 866464 is about 930.8404804262. The cubic root of 866464 is about 95.3345178373.

The spelling of 866464 in words is "eight hundred sixty-six thousand, four hundred sixty-four".