66110616541 has 2 divisors, whose sum is σ = 66110616542. Its totient is φ = 66110616540.

The previous prime is 66110616469. The next prime is 66110616547. The reversal of 66110616541 is 14561601166.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60235394041 + 5875222500 = 245429^2 + 76650^2 .

It is a cyclic number.

It is not a de Polignac number, because 66110616541 - 2¹⁹ = 66110092253 is a prime.

It is a super-2 number, since 2×66110616541² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66110616541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66110616547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33055308270 + 33055308271.

It is an arithmetic number, because the mean of its divisors is an integer number (33055308271).

Almost surely, 2^66110616541 is an apocalyptic number.

It is an amenable number.

66110616541 is a deficient number, since it is larger than the sum of its proper divisors (1).

66110616541 is an equidigital number, since it uses as much as digits as its factorization.

66110616541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 66110616541 in words is "sixty-six billion, one hundred ten million, six hundred sixteen thousand, five hundred forty-one".