866000997 has 32 divisors (see below), whose sum is σ = 1314432000. Its totient is φ = 563321520.

The previous prime is 866000909. The next prime is 866001011. The reversal of 866000997 is 799000668.

It is not a de Polignac number, because 866000997 - 2⁸ = 866000741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866007997) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 219472 + ... + 223382.

It is an arithmetic number, because the mean of its divisors is an integer number (41076000).

Almost surely, 2^866000997 is an apocalyptic number.

It is an amenable number.

866000997 is a deficient number, since it is larger than the sum of its proper divisors (448431003).

866000997 is a wasteful number, since it uses less digits than its factorization.

866000997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4118 (or 4112 counting only the distinct ones).

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

The square root of 866000997 is about 29427.8948788390. The cubic root of 866000997 is about 953.1753385321.

The spelling of 866000997 in words is "eight hundred sixty-six million, nine hundred ninety-seven", and thus it is an aban number.