866897001 has 6 divisors (see below), whose sum is σ = 1252184570. Its totient is φ = 577931328.

The previous prime is 866896981. The next prime is 866897033. The reversal of 866897001 is 100798668.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 845413776 + 21483225 = 29076^2 + 4635^2 .

It is not a de Polignac number, because 866897001 - 2⁶ = 866896937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866897041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 48160936 + ... + 48160953.

Almost surely, 2^866897001 is an apocalyptic number.

It is an amenable number.

866897001 is a deficient number, since it is larger than the sum of its proper divisors (385287569).

866897001 is a wasteful number, since it uses less digits than its factorization.

866897001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96321895 (or 96321892 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 866897001 is about 29443.1146620054. The cubic root of 866897001 is about 953.5039580688.

The spelling of 866897001 in words is "eight hundred sixty-six million, eight hundred ninety-seven thousand, one".