2666519129 has 2 divisors, whose sum is σ = 2666519130. Its totient is φ = 2666519128.

The previous prime is 2666519123. The next prime is 2666519137. The reversal of 2666519129 is 9219156662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1720341529 + 946177600 = 41477^2 + 30760^2 .

It is a cyclic number.

It is not a de Polignac number, because 2666519129 - 2⁴ = 2666519113 is a prime.

It is a super-2 number, since 2×2666519129² = 14220648530645837282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2666519123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1333259564 + 1333259565.

It is an arithmetic number, because the mean of its divisors is an integer number (1333259565).

Almost surely, 2^2666519129 is an apocalyptic number.

It is an amenable number.

2666519129 is a deficient number, since it is larger than the sum of its proper divisors (1).

2666519129 is an equidigital number, since it uses as much as digits as its factorization.

2666519129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 349920, while the sum is 47.

The square root of 2666519129 is about 51638.3494023579. The cubic root of 2666519129 is about 1386.6969740035.

The spelling of 2666519129 in words is "two billion, six hundred sixty-six million, five hundred nineteen thousand, one hundred twenty-nine".