2661272671 has 2 divisors, whose sum is σ = 2661272672. Its totient is φ = 2661272670.

The previous prime is 2661272659. The next prime is 2661272687. The reversal of 2661272671 is 1762721662.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2661272671 is a prime.

It is a super-2 number, since 2×2661272671² = 14164744458822948482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2661272641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1330636335 + 1330636336.

It is an arithmetic number, because the mean of its divisors is an integer number (1330636336).

Almost surely, 2^2661272671 is an apocalyptic number.

2661272671 is a deficient number, since it is larger than the sum of its proper divisors (1).

2661272671 is an equidigital number, since it uses as much as digits as its factorization.

2661272671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 40.

The square root of 2661272671 is about 51587.5243736313. The cubic root of 2661272671 is about 1385.7869206434.

The spelling of 2661272671 in words is "two billion, six hundred sixty-one million, two hundred seventy-two thousand, six hundred seventy-one".