866573101 has 6 divisors (see below), whose sum is σ = 895429806. Its totient is φ = 838618200.

The previous prime is 866573077. The next prime is 866573107. The reversal of 866573101 is 101375668.

It can be written as a sum of positive squares in only one way, i.e., 804573225 + 61999876 = 28365^2 + 7874^2 .

It is not a de Polignac number, because 866573101 - 2¹⁷ = 866442029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866573107) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 449910 + ... + 451831.

It is an arithmetic number, because the mean of its divisors is an integer number (149238301).

Almost surely, 2^866573101 is an apocalyptic number.

It is an amenable number.

866573101 is a deficient number, since it is larger than the sum of its proper divisors (28856705).

866573101 is an equidigital number, since it uses as much as digits as its factorization.

866573101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901803 (or 901772 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 866573101 is about 29437.6137110330. The cubic root of 866573101 is about 953.3851902476.

The spelling of 866573101 in words is "eight hundred sixty-six million, five hundred seventy-three thousand, one hundred one".