41661541777 has 2 divisors, whose sum is σ = 41661541778. Its totient is φ = 41661541776.

The previous prime is 41661541751. The next prime is 41661541783. The reversal of 41661541777 is 77714516614.

41661541777 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40458908736 + 1202633041 = 201144^2 + 34679^2 .

It is a cyclic number.

It is not a de Polignac number, because 41661541777 - 2¹⁵ = 41661509009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 41661541777.

It is not a weakly prime, because it can be changed into another prime (41661511777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20830770888 + 20830770889.

It is an arithmetic number, because the mean of its divisors is an integer number (20830770889).

Almost surely, 2^41661541777 is an apocalyptic number.

It is an amenable number.

41661541777 is a deficient number, since it is larger than the sum of its proper divisors (1).

41661541777 is an equidigital number, since it uses as much as digits as its factorization.

41661541777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 987840, while the sum is 49.

The spelling of 41661541777 in words is "forty-one billion, six hundred sixty-one million, five hundred forty-one thousand, seven hundred seventy-seven".