2661167129 has 2 divisors, whose sum is σ = 2661167130. Its totient is φ = 2661167128.

The previous prime is 2661167123. The next prime is 2661167207. The reversal of 2661167129 is 9217611662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2524861504 + 136305625 = 50248^2 + 11675^2 .

It is a cyclic number.

It is not a de Polignac number, because 2661167129 - 2²⁰ = 2660118553 is a prime.

It is not a weakly prime, because it can be changed into another prime (2661167123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1330583564 + 1330583565.

It is an arithmetic number, because the mean of its divisors is an integer number (1330583565).

Almost surely, 2^2661167129 is an apocalyptic number.

It is an amenable number.

2661167129 is a deficient number, since it is larger than the sum of its proper divisors (1).

2661167129 is an equidigital number, since it uses as much as digits as its factorization.

2661167129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 41.

The square root of 2661167129 is about 51586.5014223682. The cubic root of 2661167129 is about 1385.7686010053.

The spelling of 2661167129 in words is "two billion, six hundred sixty-one million, one hundred sixty-seven thousand, one hundred twenty-nine".