66660341441 has 2 divisors, whose sum is σ = 66660341442. Its totient is φ = 66660341440.

The previous prime is 66660341389. The next prime is 66660341459. The reversal of 66660341441 is 14414306666.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33364675600 + 33295665841 = 182660^2 + 182471^2 .

It is a cyclic number.

It is not a de Polignac number, because 66660341441 - 2²² = 66656147137 is a prime.

It is a super-2 number, since 2×66660341441² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66660341471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33330170720 + 33330170721.

It is an arithmetic number, because the mean of its divisors is an integer number (33330170721).

Almost surely, 2^66660341441 is an apocalyptic number.

It is an amenable number.

66660341441 is a deficient number, since it is larger than the sum of its proper divisors (1).

66660341441 is an equidigital number, since it uses as much as digits as its factorization.

66660341441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 248832, while the sum is 41.

The spelling of 66660341441 in words is "sixty-six billion, six hundred sixty million, three hundred forty-one thousand, four hundred forty-one".