866997 has 16 divisors (see below), whose sum is σ = 1298880. Its totient is φ = 571536.

The previous prime is 866969. The next prime is 867001. The reversal of 866997 is 799668.

It is not a de Polignac number, because 866997 - 2⁶ = 866933 is a prime.

866997 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 866997.

It is not an unprimeable number, because it can be changed into a prime (866917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4303 + ... + 4499.

It is an arithmetic number, because the mean of its divisors is an integer number (81180).

2⁸⁶⁶⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

866997 is a deficient number, since it is larger than the sum of its proper divisors (431883).

866997 is a wasteful number, since it uses less digits than its factorization.

866997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369 (or 363 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 866997 is about 931.1267368087. The cubic root of 866997 is about 95.3540619778.

The spelling of 866997 in words is "eight hundred sixty-six thousand, nine hundred ninety-seven".