6716878281 has 6 divisors (see below), whose sum is σ = 9702157530. Its totient is φ = 4477918848.

The previous prime is 6716878277. The next prime is 6716878307. The reversal of 6716878281 is 1828786176.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 4236838281 + 2480040000 = 65091^2 + 49800^2 .

It is not a de Polignac number, because 6716878281 - 2² = 6716878277 is a prime.

It is a super-2 number, since 2×6716878281² = 90232907683539029922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6716871281) 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, 373159896 + ... + 373159913.

It is an arithmetic number, because the mean of its divisors is an integer number (1617026255).

Almost surely, 2^6716878281 is an apocalyptic number.

It is an amenable number.

6716878281 is a deficient number, since it is larger than the sum of its proper divisors (2985279249).

6716878281 is a wasteful number, since it uses less digits than its factorization.

6716878281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746319815 (or 746319812 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 54.

The square root of 6716878281 is about 81956.5633796342. The cubic root of 6716878281 is about 1886.7853382376.

The spelling of 6716878281 in words is "six billion, seven hundred sixteen million, eight hundred seventy-eight thousand, two hundred eighty-one".