6877478281 has 4 divisors (see below), whose sum is σ = 6880931092. Its totient is φ = 6874025472.

The previous prime is 6877478269. The next prime is 6877478287. The reversal of 6877478281 is 1828747786.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1828747786 = 2 ⋅914373893.

It can be written as a sum of positive squares in 2 ways, for example, as 2510911881 + 4366566400 = 50109^2 + 66080^2 .

It is a cyclic number.

It is not a de Polignac number, because 6877478281 - 2⁹ = 6877477769 is a prime.

It is a super-2 number, since 2×6877478281² = 94599415011253429922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6877478287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1723416 + ... + 1727401.

It is an arithmetic number, because the mean of its divisors is an integer number (1720232773).

Almost surely, 2^6877478281 is an apocalyptic number.

It is an amenable number.

6877478281 is a deficient number, since it is larger than the sum of its proper divisors (3452811).

6877478281 is a wasteful number, since it uses less digits than its factorization.

6877478281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3452810.

The product of its digits is 8429568, while the sum is 58.

The square root of 6877478281 is about 82930.5630090620. The cubic root of 6877478281 is about 1901.7046825645.

The spelling of 6877478281 in words is "six billion, eight hundred seventy-seven million, four hundred seventy-eight thousand, two hundred eighty-one".