866919485 has 4 divisors (see below), whose sum is σ = 1040303388. Its totient is φ = 693535584.

The previous prime is 866919467. The next prime is 866919491. The reversal of 866919485 is 584919668.

It is a happy number.

866919485 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 460574521 + 406344964 = 21461^2 + 20158^2 .

It is a cyclic number.

It is not a de Polignac number, because 866919485 - 2²² = 862725181 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 866919485.

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, 86691944 + ... + 86691953.

It is an arithmetic number, because the mean of its divisors is an integer number (260075847).

Almost surely, 2^866919485 is an apocalyptic number.

It is an amenable number.

866919485 is a deficient number, since it is larger than the sum of its proper divisors (173383903).

866919485 is a wasteful number, since it uses less digits than its factorization.

866919485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173383902.

The product of its digits is 3732480, while the sum is 56.

The square root of 866919485 is about 29443.4964805473. The cubic root of 866919485 is about 953.5122014155.

The spelling of 866919485 in words is "eight hundred sixty-six million, nine hundred nineteen thousand, four hundred eighty-five".