8667957861 has 6 divisors (see below), whose sum is σ = 12520383590. Its totient is φ = 5778638568.

The previous prime is 8667957839. The next prime is 8667957863. The reversal of 8667957861 is 1687597668.

It can be written as a sum of positive squares in only one way, i.e., 8452044225 + 215913636 = 91935^2 + 14694^2 .

It is not a de Polignac number, because 8667957861 - 2⁶ = 8667957797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8667957863) 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 in 5 ways as a sum of consecutive naturals, for example, 481553206 + ... + 481553223.

Almost surely, 2^8667957861 is an apocalyptic number.

It is an amenable number.

8667957861 is a deficient number, since it is larger than the sum of its proper divisors (3852425729).

8667957861 is a wasteful number, since it uses less digits than its factorization.

8667957861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963106435 (or 963106432 counting only the distinct ones).

The product of its digits is 30481920, while the sum is 63.

The square root of 8667957861 is about 93101.8681928564. The cubic root of 8667957861 is about 2054.1820525119.

The spelling of 8667957861 in words is "eight billion, six hundred sixty-seven million, nine hundred fifty-seven thousand, eight hundred sixty-one".