4071817661 has 2 divisors, whose sum is σ = 4071817662. Its totient is φ = 4071817660.

The previous prime is 4071817637. The next prime is 4071817663. The reversal of 4071817661 is 1667181704.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3479820100 + 591997561 = 58990^2 + 24331^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4071817661 is a prime.

It is a super-4 number, since 4×4071817661⁴ (a number of 40 digits) contains 4444 as substring.

Together with 4071817663, 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 (4071817663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2035908830 + 2035908831.

It is an arithmetic number, because the mean of its divisors is an integer number (2035908831).

Almost surely, 2^4071817661 is an apocalyptic number.

It is an amenable number.

4071817661 is a deficient number, since it is larger than the sum of its proper divisors (1).

4071817661 is an equidigital number, since it uses as much as digits as its factorization.

4071817661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 41.

The square root of 4071817661 is about 63810.7958029047. The cubic root of 4071817661 is about 1596.8450409275.

The spelling of 4071817661 in words is "four billion, seventy-one million, eight hundred seventeen thousand, six hundred sixty-one".