866739485 has 4 divisors (see below), whose sum is σ = 1040087388. Its totient is φ = 693391584.

The previous prime is 866739463. The next prime is 866739491. The reversal of 866739485 is 584937668.

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 322777156 + 543962329 = 17966^2 + 23323^2 .

It is a cyclic number.

It is not a de Polignac number, because 866739485 - 2²⁰ = 865690909 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 866739485.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86673944 + ... + 86673953.

It is an arithmetic number, because the mean of its divisors is an integer number (260021847).

Almost surely, 2^866739485 is an apocalyptic number.

It is an amenable number.

866739485 is a deficient number, since it is larger than the sum of its proper divisors (173347903).

866739485 is a wasteful number, since it uses less digits than its factorization.

866739485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173347902.

The product of its digits is 8709120, while the sum is 56.

The square root of 866739485 is about 29440.4396196796. The cubic root of 866739485 is about 953.4462037155.

The spelling of 866739485 in words is "eight hundred sixty-six million, seven hundred thirty-nine thousand, four hundred eighty-five".