866485772 has 6 divisors (see below), whose sum is σ = 1516350108. Its totient is φ = 433242884.

The previous prime is 866485769. The next prime is 866485777. The reversal of 866485772 is 277584668.

It is not an unprimeable number, because it can be changed into a prime (866485777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108310718 + ... + 108310725.

It is an arithmetic number, because the mean of its divisors is an integer number (252725018).

Almost surely, 2^866485772 is an apocalyptic number.

It is an amenable number.

866485772 is a deficient number, since it is larger than the sum of its proper divisors (649864336).

866485772 is a wasteful number, since it uses less digits than its factorization.

866485772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216621447 (or 216621445 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 53.

The square root of 866485772 is about 29436.1303842744. The cubic root of 866485772 is about 953.3531633391.

The spelling of 866485772 in words is "eight hundred sixty-six million, four hundred eighty-five thousand, seven hundred seventy-two".