166533427 has 2 divisors, whose sum is σ = 166533428. Its totient is φ = 166533426.

The previous prime is 166533421. The next prime is 166533481. The reversal of 166533427 is 724335661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166533427 - 2⁷ = 166533299 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (166533421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83266713 + 83266714.

It is an arithmetic number, because the mean of its divisors is an integer number (83266714).

Almost surely, 2^166533427 is an apocalyptic number.

166533427 is a deficient number, since it is larger than the sum of its proper divisors (1).

166533427 is an equidigital number, since it uses as much as digits as its factorization.

166533427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 37.

The square root of 166533427 is about 12904.7831055001. The cubic root of 166533427 is about 550.1745198241.

The spelling of 166533427 in words is "one hundred sixty-six million, five hundred thirty-three thousand, four hundred twenty-seven".