6165100111661 has 2 divisors, whose sum is σ = 6165100111662. Its totient is φ = 6165100111660.

The previous prime is 6165100111657. The next prime is 6165100111679. The reversal of 6165100111661 is 1661110015616.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5692280222500 + 472819889161 = 2385850^2 + 687619^2 .

It is a cyclic number.

It is not a de Polignac number, because 6165100111661 - 2² = 6165100111657 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6165100110661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3082550055830 + 3082550055831.

It is an arithmetic number, because the mean of its divisors is an integer number (3082550055831).

Almost surely, 2^{6165100111661} is an apocalyptic number.

It is an amenable number.

6165100111661 is a deficient number, since it is larger than the sum of its proper divisors (1).

6165100111661 is an equidigital number, since it uses as much as digits as its factorization.

6165100111661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 35.

The spelling of 6165100111661 in words is "six trillion, one hundred sixty-five billion, one hundred million, one hundred eleven thousand, six hundred sixty-one".