66701111 has 2 divisors, whose sum is σ = 66701112. Its totient is φ = 66701110.

The previous prime is 66701101. The next prime is 66701147. The reversal of 66701111 is 11110766.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66701111 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66701101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33350555 + 33350556.

It is an arithmetic number, because the mean of its divisors is an integer number (33350556).

Almost surely, 2^66701111 is an apocalyptic number.

66701111 is a deficient number, since it is larger than the sum of its proper divisors (1).

66701111 is an equidigital number, since it uses as much as digits as its factorization.

66701111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 66701111 is about 8167.0748129303. The cubic root of 66701111 is about 405.5499534793.

Adding to 66701111 its reverse (11110766), we get a palindrome (77811877).

The spelling of 66701111 in words is "sixty-six million, seven hundred one thousand, one hundred eleven".