66141511 has 2 divisors, whose sum is σ = 66141512. Its totient is φ = 66141510.

The previous prime is 66141497. The next prime is 66141521. The reversal of 66141511 is 11514166.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66141511 - 2²¹ = 64044359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66141521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33070755 + 33070756.

It is an arithmetic number, because the mean of its divisors is an integer number (33070756).

Almost surely, 2^66141511 is an apocalyptic number.

66141511 is a deficient number, since it is larger than the sum of its proper divisors (1).

66141511 is an equidigital number, since it uses as much as digits as its factorization.

66141511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 25.

The square root of 66141511 is about 8132.7431411548. The cubic root of 66141511 is about 404.4126241223.

Adding to 66141511 its reverse (11514166), we get a palindrome (77655677).

The spelling of 66141511 in words is "sixty-six million, one hundred forty-one thousand, five hundred eleven".