166207247 has 2 divisors, whose sum is σ = 166207248. Its totient is φ = 166207246.

The previous prime is 166207243. The next prime is 166207253. The reversal of 166207247 is 742702661.

It is a weak prime.

It is an emirp because it is prime and its reverse (742702661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166207247 - 2² = 166207243 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166207241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83103623 + 83103624.

It is an arithmetic number, because the mean of its divisors is an integer number (83103624).

Almost surely, 2^166207247 is an apocalyptic number.

166207247 is a deficient number, since it is larger than the sum of its proper divisors (1).

166207247 is an equidigital number, since it uses as much as digits as its factorization.

166207247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 166207247 is about 12892.1389613981. The cubic root of 166207247 is about 549.8150860469.

The spelling of 166207247 in words is "one hundred sixty-six million, two hundred seven thousand, two hundred forty-seven".