866769387 has 16 divisors (see below), whose sum is σ = 1261951488. Its totient is φ = 524816480.

The previous prime is 866769383. The next prime is 866769403. The reversal of 866769387 is 783967668.

It is a cyclic number.

It is not a de Polignac number, because 866769387 - 2² = 866769383 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 866769387.

It is not an unprimeable number, because it can be changed into a prime (866769383) 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 15 ways as a sum of consecutive naturals, for example, 24493 + ... + 48305.

It is an arithmetic number, because the mean of its divisors is an integer number (78871968).

Almost surely, 2^866769387 is an apocalyptic number.

866769387 is a deficient number, since it is larger than the sum of its proper divisors (395182101).

866769387 is a wasteful number, since it uses less digits than its factorization.

866769387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24930.

The product of its digits is 18289152, while the sum is 60.

The square root of 866769387 is about 29440.9474541836. The cubic root of 866769387 is about 953.4571680329.

The spelling of 866769387 in words is "eight hundred sixty-six million, seven hundred sixty-nine thousand, three hundred eighty-seven".