4065660174421 has 2 divisors, whose sum is σ = 4065660174422. Its totient is φ = 4065660174420.

The previous prime is 4065660174403. The next prime is 4065660174431. The reversal of 4065660174421 is 1244710665604.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4042958725521 + 22701448900 = 2010711^2 + 150670^2 .

It is a cyclic number.

It is not a de Polignac number, because 4065660174421 - 2¹³ = 4065660166229 is a prime.

It is a super-2 number, since 2×4065660174421² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4065660174431) 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, 2032830087210 + 2032830087211.

It is an arithmetic number, because the mean of its divisors is an integer number (2032830087211).

Almost surely, 2^{4065660174421} is an apocalyptic number.

It is an amenable number.

4065660174421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4065660174421 is an equidigital number, since it uses as much as digits as its factorization.

4065660174421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 967680, while the sum is 46.

The spelling of 4065660174421 in words is "four trillion, sixty-five billion, six hundred sixty million, one hundred seventy-four thousand, four hundred twenty-one".