2135666441 has 2 divisors, whose sum is σ = 2135666442. Its totient is φ = 2135666440.

The previous prime is 2135666419. The next prime is 2135666453. The reversal of 2135666441 is 1446665312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1598400400 + 537266041 = 39980^2 + 23179^2 .

It is a cyclic number.

It is not a de Polignac number, because 2135666441 - 2²⁶ = 2068557577 is a prime.

It is a super-2 number, since 2×2135666441² = 9122142294427212962, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2135666395 and 2135666404.

It is not a weakly prime, because it can be changed into another prime (2135666471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1067833220 + 1067833221.

It is an arithmetic number, because the mean of its divisors is an integer number (1067833221).

Almost surely, 2^2135666441 is an apocalyptic number.

It is an amenable number.

2135666441 is a deficient number, since it is larger than the sum of its proper divisors (1).

2135666441 is an equidigital number, since it uses as much as digits as its factorization.

2135666441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 38.

The square root of 2135666441 is about 46213.2712648650. The cubic root of 2135666441 is about 1287.7882982255.

The spelling of 2135666441 in words is "two billion, one hundred thirty-five million, six hundred sixty-six thousand, four hundred forty-one".