866677689 has 6 divisors (see below), whose sum is σ = 1251867786. Its totient is φ = 577785120.

The previous prime is 866677687. The next prime is 866677699. The reversal of 866677689 is 986776668.

It can be written as a sum of positive squares in only one way, i.e., 644906025 + 221771664 = 25395^2 + 14892^2 .

It is not a de Polignac number, because 866677689 - 2¹ = 866677687 is a prime.

It is a super-2 number, since 2×866677689² = 1502260433220761442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (866677687) 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 5 ways as a sum of consecutive naturals, for example, 48148752 + ... + 48148769.

It is an arithmetic number, because the mean of its divisors is an integer number (208644631).

Almost surely, 2^866677689 is an apocalyptic number.

It is an amenable number.

866677689 is a deficient number, since it is larger than the sum of its proper divisors (385190097).

866677689 is a wasteful number, since it uses less digits than its factorization.

866677689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96297527 (or 96297524 counting only the distinct ones).

The product of its digits is 36578304, while the sum is 63.

The square root of 866677689 is about 29439.3900921877. The cubic root of 866677689 is about 953.4235438648.

The spelling of 866677689 in words is "eight hundred sixty-six million, six hundred seventy-seven thousand, six hundred eighty-nine".