866541545 has 4 divisors (see below), whose sum is σ = 1039849860. Its totient is φ = 693233232.

The previous prime is 866541541. The next prime is 866541563. The reversal of 866541545 is 545145668.

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

It can be written as a sum of positive squares in 2 ways, for example, as 291453184 + 575088361 = 17072^2 + 23981^2 .

It is a cyclic number.

It is not a de Polignac number, because 866541545 - 2² = 866541541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 866541496 and 866541505.

It is not an unprimeable number, because it can be changed into a prime (866541541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86654150 + ... + 86654159.

It is an arithmetic number, because the mean of its divisors is an integer number (259962465).

Almost surely, 2^866541545 is an apocalyptic number.

It is an amenable number.

866541545 is a deficient number, since it is larger than the sum of its proper divisors (173308315).

866541545 is a wasteful number, since it uses less digits than its factorization.

866541545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173308314.

The product of its digits is 576000, while the sum is 44.

The square root of 866541545 is about 29437.0777252091. The cubic root of 866541545 is about 953.3736176950.

The spelling of 866541545 in words is "eight hundred sixty-six million, five hundred forty-one thousand, five hundred forty-five".