40661141 has 2 divisors, whose sum is σ = 40661142. Its totient is φ = 40661140.

The previous prime is 40661099. The next prime is 40661143. The reversal of 40661141 is 14116604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27520516 + 13140625 = 5246^2 + 3625^2 .

It is a cyclic number.

It is not a de Polignac number, because 40661141 - 2¹⁴ = 40644757 is a prime.

Together with 40661143, 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 (40661143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20330570 + 20330571.

It is an arithmetic number, because the mean of its divisors is an integer number (20330571).

Almost surely, 2^40661141 is an apocalyptic number.

It is an amenable number.

40661141 is a deficient number, since it is larger than the sum of its proper divisors (1).

40661141 is an equidigital number, since it uses as much as digits as its factorization.

40661141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 40661141 is about 6376.6088950162. The cubic root of 40661141 is about 343.8691278130.

Adding to 40661141 its reverse (14116604), we get a palindrome (54777745).

The spelling of 40661141 in words is "forty million, six hundred sixty-one thousand, one hundred forty-one".