66070247 has 2 divisors, whose sum is σ = 66070248. Its totient is φ = 66070246.

The previous prime is 66070187. The next prime is 66070321. The reversal of 66070247 is 74207066.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66070247 - 2¹² = 66066151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66070447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33035123 + 33035124.

It is an arithmetic number, because the mean of its divisors is an integer number (33035124).

Almost surely, 2^66070247 is an apocalyptic number.

66070247 is a deficient number, since it is larger than the sum of its proper divisors (1).

66070247 is an equidigital number, since it uses as much as digits as its factorization.

66070247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 66070247 is about 8128.3606588291. The cubic root of 66070247 is about 404.2673274813.

It can be divided in two parts, 660 and 70247, that added together give a palindrome (70907).

The spelling of 66070247 in words is "sixty-six million, seventy thousand, two hundred forty-seven".