66747211 has 2 divisors, whose sum is σ = 66747212. Its totient is φ = 66747210.

The previous prime is 66747199. The next prime is 66747217. The reversal of 66747211 is 11274766.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66747211 - 2⁹ = 66746699 is a prime.

It is not a weakly prime, because it can be changed into another prime (66747217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33373605 + 33373606.

It is an arithmetic number, because the mean of its divisors is an integer number (33373606).

Almost surely, 2^66747211 is an apocalyptic number.

66747211 is a deficient number, since it is larger than the sum of its proper divisors (1).

66747211 is an equidigital number, since it uses as much as digits as its factorization.

66747211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14112, while the sum is 34.

The square root of 66747211 is about 8169.8966333730. The cubic root of 66747211 is about 405.6433629546.

The spelling of 66747211 in words is "sixty-six million, seven hundred forty-seven thousand, two hundred eleven".