6540756671 has 2 divisors, whose sum is σ = 6540756672. Its totient is φ = 6540756670.

The previous prime is 6540756653. The next prime is 6540756709. The reversal of 6540756671 is 1766570456.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6540756671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6540756601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3270378335 + 3270378336.

It is an arithmetic number, because the mean of its divisors is an integer number (3270378336).

Almost surely, 2^6540756671 is an apocalyptic number.

6540756671 is a deficient number, since it is larger than the sum of its proper divisors (1).

6540756671 is an equidigital number, since it uses as much as digits as its factorization.

6540756671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1058400, while the sum is 47.

The square root of 6540756671 is about 80874.9446429486. The cubic root of 6540756671 is about 1870.1480881132.

The spelling of 6540756671 in words is "six billion, five hundred forty million, seven hundred fifty-six thousand, six hundred seventy-one".