2061166517 has 2 divisors, whose sum is σ = 2061166518. Its totient is φ = 2061166516.

The previous prime is 2061166469. The next prime is 2061166519. The reversal of 2061166517 is 7156611602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2034551236 + 26615281 = 45106^2 + 5159^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2061166517 is a prime.

It is a super-3 number, since 3×2061166517³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 2061166519, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2061166519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1030583258 + 1030583259.

It is an arithmetic number, because the mean of its divisors is an integer number (1030583259).

Almost surely, 2^2061166517 is an apocalyptic number.

It is an amenable number.

2061166517 is a deficient number, since it is larger than the sum of its proper divisors (1).

2061166517 is an equidigital number, since it uses as much as digits as its factorization.

2061166517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 2061166517 is about 45400.0717730710. The cubic root of 2061166517 is about 1272.6364551967.

The spelling of 2061166517 in words is "two billion, sixty-one million, one hundred sixty-six thousand, five hundred seventeen".