866741531 has 4 divisors (see below), whose sum is σ = 896629200. Its totient is φ = 836853864.

The previous prime is 866741521. The next prime is 866741581. The reversal of 866741531 is 135147668.

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

It is a cyclic number.

It is not a de Polignac number, because 866741531 - 2⁶ = 866741467 is a prime.

It is a super-2 number, since 2×866741531² = 1502481763120447922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866741501) 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, 14943791 + ... + 14943848.

It is an arithmetic number, because the mean of its divisors is an integer number (224157300).

Almost surely, 2^866741531 is an apocalyptic number.

866741531 is a deficient number, since it is larger than the sum of its proper divisors (29887669).

866741531 is a wasteful number, since it uses less digits than its factorization.

866741531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29887668.

The product of its digits is 120960, while the sum is 41.

The square root of 866741531 is about 29440.4743677815. The cubic root of 866741531 is about 953.4469539407.

The spelling of 866741531 in words is "eight hundred sixty-six million, seven hundred forty-one thousand, five hundred thirty-one".