166867727 has 6 divisors (see below), whose sum is σ = 180691272. Its totient is φ = 154031592.

The previous prime is 166867717. The next prime is 166867739. The reversal of 166867727 is 727768661.

It is not a de Polignac number, because 166867727 - 2¹⁴ = 166851343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166867717) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 493523 + ... + 493860.

It is an arithmetic number, because the mean of its divisors is an integer number (30115212).

Almost surely, 2^166867727 is an apocalyptic number.

166867727 is a deficient number, since it is larger than the sum of its proper divisors (13823545).

166867727 is an equidigital number, since it uses as much as digits as its factorization.

166867727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 987409 (or 987396 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 50.

The square root of 166867727 is about 12917.7291735041. The cubic root of 166867727 is about 550.5424147523.

The spelling of 166867727 in words is "one hundred sixty-six million, eight hundred sixty-seven thousand, seven hundred twenty-seven".