866040615 has 48 divisors (see below), whose sum is σ = 1723812480. Its totient is φ = 397794240.

The previous prime is 866040613. The next prime is 866040619. The reversal of 866040615 is 516040668.

It is not a de Polignac number, because 866040615 - 2¹ = 866040613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 866040615.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866040613) 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 47 ways as a sum of consecutive naturals, for example, 36637 + ... + 55446.

It is an arithmetic number, because the mean of its divisors is an integer number (35912760).

Almost surely, 2^866040615 is an apocalyptic number.

866040615 is a deficient number, since it is larger than the sum of its proper divisors (857771865).

866040615 is a wasteful number, since it uses less digits than its factorization.

866040615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92124 (or 92121 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 866040615 is about 29428.5680079748. The cubic root of 866040615 is about 953.1898736673.

The spelling of 866040615 in words is "eight hundred sixty-six million, forty thousand, six hundred fifteen".