66376441 has 2 divisors, whose sum is σ = 66376442. Its totient is φ = 66376440.

The previous prime is 66376439. The next prime is 66376451. The reversal of 66376441 is 14467366.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57820816 + 8555625 = 7604^2 + 2925^2 .

It is a cyclic number.

It is not a de Polignac number, because 66376441 - 2¹ = 66376439 is a prime.

Together with 66376439, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 66376441.

It is not a weakly prime, because it can be changed into another prime (66376411) 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, 33188220 + 33188221.

It is an arithmetic number, because the mean of its divisors is an integer number (33188221).

Almost surely, 2^66376441 is an apocalyptic number.

It is an amenable number.

66376441 is a deficient number, since it is larger than the sum of its proper divisors (1).

66376441 is an equidigital number, since it uses as much as digits as its factorization.

66376441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 37.

The square root of 66376441 is about 8147.1738044551. The cubic root of 66376441 is about 404.8908734082.

The spelling of 66376441 in words is "sixty-six million, three hundred seventy-six thousand, four hundred forty-one".