866312801 has 4 divisors (see below), whose sum is σ = 866685204. Its totient is φ = 865940400.

The previous prime is 866312761. The next prime is 866312803. The reversal of 866312801 is 108213668.

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 302725201 + 563587600 = 17399^2 + 23740^2 .

It is a cyclic number.

It is not a de Polignac number, because 866312801 - 2²² = 862118497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866312803) 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, 182690 + ... + 187371.

It is an arithmetic number, because the mean of its divisors is an integer number (216671301).

Almost surely, 2^866312801 is an apocalyptic number.

It is an amenable number.

866312801 is a deficient number, since it is larger than the sum of its proper divisors (372403).

866312801 is a wasteful number, since it uses less digits than its factorization.

866312801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372402.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 866312801 is about 29433.1921646294. The cubic root of 866312801 is about 953.2897218573.

The spelling of 866312801 in words is "eight hundred sixty-six million, three hundred twelve thousand, eight hundred one".