866411501 has 4 divisors (see below), whose sum is σ = 867738972. Its totient is φ = 865084032.

The previous prime is 866411459. The next prime is 866411543. The reversal of 866411501 is 105114668.

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 (866411459) and next prime (866411543).

It can be written as a sum of positive squares in 2 ways, for example, as 325802500 + 540609001 = 18050^2 + 23251^2 .

It is a cyclic number.

It is not a de Polignac number, because 866411501 - 2¹⁰ = 866410477 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 (866411551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 662756 + ... + 664061.

It is an arithmetic number, because the mean of its divisors is an integer number (216934743).

Almost surely, 2^866411501 is an apocalyptic number.

It is an amenable number.

866411501 is a deficient number, since it is larger than the sum of its proper divisors (1327471).

866411501 is a wasteful number, since it uses less digits than its factorization.

866411501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1327470.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 866411501 is about 29434.8687953590. The cubic root of 866411501 is about 953.3259236089.

The spelling of 866411501 in words is "eight hundred sixty-six million, four hundred eleven thousand, five hundred one".