866676001 has 4 divisors (see below), whose sum is σ = 866972052. Its totient is φ = 866379952.

The previous prime is 866675993. The next prime is 866676017. The reversal of 866676001 is 100676668.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 58752225 + 807923776 = 7665^2 + 28424^2 .

It is a cyclic number.

It is not a de Polignac number, because 866676001 - 2³ = 866675993 is a prime.

It is a super-2 number, since 2×866676001² = 1502254581418704002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866676071) 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, 143590 + ... + 149503.

It is an arithmetic number, because the mean of its divisors is an integer number (216743013).

Almost surely, 2^866676001 is an apocalyptic number.

It is an amenable number.

866676001 is a deficient number, since it is larger than the sum of its proper divisors (296051).

866676001 is a wasteful number, since it uses less digits than its factorization.

866676001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296050.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 866676001 is about 29439.3614231016. The cubic root of 866676001 is about 953.4229248804.

The spelling of 866676001 in words is "eight hundred sixty-six million, six hundred seventy-six thousand, one".