166245427 has 2 divisors, whose sum is σ = 166245428. Its totient is φ = 166245426.

The previous prime is 166245389. The next prime is 166245437. The reversal of 166245427 is 724542661.

166245427 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166245427 is a prime.

It is not a weakly prime, because it can be changed into another prime (166245437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83122713 + 83122714.

It is an arithmetic number, because the mean of its divisors is an integer number (83122714).

Almost surely, 2^166245427 is an apocalyptic number.

166245427 is a deficient number, since it is larger than the sum of its proper divisors (1).

166245427 is an equidigital number, since it uses as much as digits as its factorization.

166245427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 37.

The square root of 166245427 is about 12893.6196236743. The cubic root of 166245427 is about 549.8571827529.

It can be divided in two parts, 1662 and 45427, that added together give a square (47089 = 217²).

The spelling of 166245427 in words is "one hundred sixty-six million, two hundred forty-five thousand, four hundred twenty-seven".