866880901 has 2 divisors, whose sum is σ = 866880902. Its totient is φ = 866880900.

The previous prime is 866880893. The next prime is 866880991. The reversal of 866880901 is 109088668.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 850888900 + 15992001 = 29170^2 + 3999^2 .

It is a cyclic number.

It is not a de Polignac number, because 866880901 - 2³ = 866880893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866880991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433440450 + 433440451.

It is an arithmetic number, because the mean of its divisors is an integer number (433440451).

Almost surely, 2^866880901 is an apocalyptic number.

It is an amenable number.

866880901 is a deficient number, since it is larger than the sum of its proper divisors (1).

866880901 is an equidigital number, since it uses as much as digits as its factorization.

866880901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 46.

The square root of 866880901 is about 29442.8412521618. The cubic root of 866880901 is about 953.4980552112.

The spelling of 866880901 in words is "eight hundred sixty-six million, eight hundred eighty thousand, nine hundred one".