866149241 has 4 divisors (see below), whose sum is σ = 866648484. Its totient is φ = 865650000.

The previous prime is 866149223. The next prime is 866149259. The reversal of 866149241 is 142941668.

866149241 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (866149223) and next prime (866149259).

It can be written as a sum of positive squares in 2 ways, for example, as 87516025 + 778633216 = 9355^2 + 27904^2 .

It is a cyclic number.

It is not a de Polignac number, because 866149241 - 2¹⁸ = 865887097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866149261) 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, 247010 + ... + 250491.

It is an arithmetic number, because the mean of its divisors is an integer number (216662121).

Almost surely, 2^866149241 is an apocalyptic number.

It is an amenable number.

866149241 is a deficient number, since it is larger than the sum of its proper divisors (499243).

866149241 is a wasteful number, since it uses less digits than its factorization.

866149241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499242.

The product of its digits is 82944, while the sum is 41.

The square root of 866149241 is about 29430.4135376994. The cubic root of 866149241 is about 953.2297243289.

The spelling of 866149241 in words is "eight hundred sixty-six million, one hundred forty-nine thousand, two hundred forty-one".