2661172039 has 2 divisors, whose sum is σ = 2661172040. Its totient is φ = 2661172038.

The previous prime is 2661171991. The next prime is 2661172051. The reversal of 2661172039 is 9302711662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2661172039 - 2¹¹ = 2661169991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2661171989 and 2661172007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2661172439) 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 as a sum of consecutive naturals, namely, 1330586019 + 1330586020.

It is an arithmetic number, because the mean of its divisors is an integer number (1330586020).

Almost surely, 2^2661172039 is an apocalyptic number.

2661172039 is a deficient number, since it is larger than the sum of its proper divisors (1).

2661172039 is an equidigital number, since it uses as much as digits as its factorization.

2661172039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 2661172039 is about 51586.5490123152. The cubic root of 2661172039 is about 1385.7694532779.

The spelling of 2661172039 in words is "two billion, six hundred sixty-one million, one hundred seventy-two thousand, thirty-nine".