6782907861 has 6 divisors (see below), whose sum is σ = 9797533590. Its totient is φ = 4521938568.

The previous prime is 6782907853. The next prime is 6782907889. The reversal of 6782907861 is 1687092876.

It can be written as a sum of positive squares in only one way, i.e., 6770162961 + 12744900 = 82281^2 + 3570^2 .

It is not a de Polignac number, because 6782907861 - 2³ = 6782907853 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6782907798 and 6782907807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6782907811) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 376828206 + ... + 376828223.

It is an arithmetic number, because the mean of its divisors is an integer number (1632922265).

Almost surely, 2^6782907861 is an apocalyptic number.

It is an amenable number.

6782907861 is a deficient number, since it is larger than the sum of its proper divisors (3014625729).

6782907861 is a wasteful number, since it uses less digits than its factorization.

6782907861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753656435 (or 753656432 counting only the distinct ones).

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

The square root of 6782907861 is about 82358.4109912278. The cubic root of 6782907861 is about 1892.9478052689.

The spelling of 6782907861 in words is "six billion, seven hundred eighty-two million, nine hundred seven thousand, eight hundred sixty-one".