8676920781 has 6 divisors (see below), whose sum is σ = 12533330030. Its totient is φ = 5784613848.

The previous prime is 8676920771. The next prime is 8676920803. The reversal of 8676920781 is 1870296768.

8676920781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 4649876100 + 4027044681 = 68190^2 + 63459^2 .

It is not a de Polignac number, because 8676920781 - 2²¹ = 8674823629 is a prime.

It is a super-2 number, since 2×8676920781² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8676920731) 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, 482051146 + ... + 482051163.

Almost surely, 2^8676920781 is an apocalyptic number.

It is an amenable number.

8676920781 is a deficient number, since it is larger than the sum of its proper divisors (3856409249).

8676920781 is a wasteful number, since it uses less digits than its factorization.

8676920781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964102315 (or 964102312 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 54.

The square root of 8676920781 is about 93149.9907729464. The cubic root of 8676920781 is about 2054.8898365653.

The spelling of 8676920781 in words is "eight billion, six hundred seventy-six million, nine hundred twenty thousand, seven hundred eighty-one".