66315911 has 2 divisors, whose sum is σ = 66315912. Its totient is φ = 66315910.

The previous prime is 66315883. The next prime is 66315943. The reversal of 66315911 is 11951366.

It is a happy number.

It is an a-pointer prime, because the next prime (66315943) can be obtained adding 66315911 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66315911 - 2¹⁰ = 66314887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66315511) 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, 33157955 + 33157956.

It is an arithmetic number, because the mean of its divisors is an integer number (33157956).

Almost surely, 2^66315911 is an apocalyptic number.

66315911 is a deficient number, since it is larger than the sum of its proper divisors (1).

66315911 is an equidigital number, since it uses as much as digits as its factorization.

66315911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4860, while the sum is 32.

The square root of 66315911 is about 8143.4581720544. The cubic root of 66315911 is about 404.7677599573.

The spelling of 66315911 in words is "sixty-six million, three hundred fifteen thousand, nine hundred eleven".