166315427 has 2 divisors, whose sum is σ = 166315428. Its totient is φ = 166315426.

The previous prime is 166315411. The next prime is 166315447. The reversal of 166315427 is 724513661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166315427 - 2⁴ = 166315411 is a prime.

It is a super-3 number, since 3×166315427³ (a number of 26 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (166315447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83157713 + 83157714.

It is an arithmetic number, because the mean of its divisors is an integer number (83157714).

Almost surely, 2^166315427 is an apocalyptic number.

166315427 is a deficient number, since it is larger than the sum of its proper divisors (1).

166315427 is an equidigital number, since it uses as much as digits as its factorization.

166315427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 35.

The square root of 166315427 is about 12896.3338588918. Note that the first 3 decimals coincide. The cubic root of 166315427 is about 549.9343469843.

The spelling of 166315427 in words is "one hundred sixty-six million, three hundred fifteen thousand, four hundred twenty-seven".