40021166441 has 2 divisors, whose sum is σ = 40021166442. Its totient is φ = 40021166440.

The previous prime is 40021166429. The next prime is 40021166453. The reversal of 40021166441 is 14466112004.

It is a balanced prime because it is at equal distance from previous prime (40021166429) and next prime (40021166453).

It can be written as a sum of positive squares in only one way, i.e., 34031025625 + 5990140816 = 184475^2 + 77396^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40021166441 is a prime.

It is a super-3 number, since 3×40021166441³ (a number of 33 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (40021166741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20010583220 + 20010583221.

It is an arithmetic number, because the mean of its divisors is an integer number (20010583221).

Almost surely, 2^40021166441 is an apocalyptic number.

It is an amenable number.

40021166441 is a deficient number, since it is larger than the sum of its proper divisors (1).

40021166441 is an equidigital number, since it uses as much as digits as its factorization.

40021166441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 29.

Adding to 40021166441 its reverse (14466112004), we get a palindrome (54487278445).

The spelling of 40021166441 in words is "forty billion, twenty-one million, one hundred sixty-six thousand, four hundred forty-one".