166663127 has 2 divisors, whose sum is σ = 166663128. Its totient is φ = 166663126.

The previous prime is 166663069. The next prime is 166663139. The reversal of 166663127 is 721366661.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166663127 - 2⁸ = 166662871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166663177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83331563 + 83331564.

It is an arithmetic number, because the mean of its divisors is an integer number (83331564).

Almost surely, 2^166663127 is an apocalyptic number.

166663127 is a deficient number, since it is larger than the sum of its proper divisors (1).

166663127 is an equidigital number, since it uses as much as digits as its factorization.

166663127 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 38.

The square root of 166663127 is about 12909.8073959297. The cubic root of 166663127 is about 550.3173122143.

The spelling of 166663127 in words is "one hundred sixty-six million, six hundred sixty-three thousand, one hundred twenty-seven".