866759649 has 16 divisors (see below), whose sum is σ = 1321193472. Its totient is φ = 495134928.

The previous prime is 866759629. The next prime is 866759711. The reversal of 866759649 is 946957668.

It is not a de Polignac number, because 866759649 - 2⁵ = 866759617 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 866759592 and 866759601.

It is not an unprimeable number, because it can be changed into a prime (866759609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110512 + ... + 118094.

It is an arithmetic number, because the mean of its divisors is an integer number (82574592).

Almost surely, 2^866759649 is an apocalyptic number.

It is an amenable number.

866759649 is a deficient number, since it is larger than the sum of its proper divisors (454433823).

866759649 is a wasteful number, since it uses less digits than its factorization.

866759649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13036.

The product of its digits is 19595520, while the sum is 60.

The square root of 866759649 is about 29440.7820718132. The cubic root of 866759649 is about 953.4535973789.

The spelling of 866759649 in words is "eight hundred sixty-six million, seven hundred fifty-nine thousand, six hundred forty-nine".