66412441 has 2 divisors, whose sum is σ = 66412442. Its totient is φ = 66412440.

The previous prime is 66412433. The next prime is 66412471. The reversal of 66412441 is 14421466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44836416 + 21576025 = 6696^2 + 4645^2 .

It is a cyclic number.

It is not a de Polignac number, because 66412441 - 2³ = 66412433 is a prime.

It is a super-4 number, since 4×66412441⁴ (a number of 32 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (66412471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33206220 + 33206221.

It is an arithmetic number, because the mean of its divisors is an integer number (33206221).

Almost surely, 2^66412441 is an apocalyptic number.

It is an amenable number.

66412441 is a deficient number, since it is larger than the sum of its proper divisors (1).

66412441 is an equidigital number, since it uses as much as digits as its factorization.

66412441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 28.

The square root of 66412441 is about 8149.3828600698. The cubic root of 66412441 is about 404.9640591995.

The spelling of 66412441 in words is "sixty-six million, four hundred twelve thousand, four hundred forty-one".