866265534 has 48 divisors (see below), whose sum is σ = 1942546320. Its totient is φ = 278778240.

The previous prime is 866265529. The next prime is 866265541. The reversal of 866265534 is 435562668.

It is a self number, because there is not a number n which added to its sum of digits gives 866265534.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82282 + ... + 92210.

It is an arithmetic number, because the mean of its divisors is an integer number (40469715).

Almost surely, 2^866265534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 866265534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (971273160).

866265534 is an abundant number, since it is smaller than the sum of its proper divisors (1076280786).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

866265534 is a wasteful number, since it uses less digits than its factorization.

866265534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10105 (or 10102 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 45.

The square root of 866265534 is about 29432.3891996555. The cubic root of 866265534 is about 953.2723840224.

The spelling of 866265534 in words is "eight hundred sixty-six million, two hundred sixty-five thousand, five hundred thirty-four".