1668167 has 16 divisors (see below), whose sum is σ = 1874880. Its totient is φ = 1478400.

The previous prime is 1668137. The next prime is 1668197. The reversal of 1668167 is 7618661.

It is an interprime number because it is at equal distance from previous prime (1668137) and next prime (1668197).

It is a cyclic number.

It is not a de Polignac number, because 1668167 - 2¹⁰ = 1667143 is a prime.

It is a super-2 number, since 2×1668167² = 5565562279778, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27317 + ... + 27377.

It is an arithmetic number, because the mean of its divisors is an integer number (117180).

2^1668167 is an apocalyptic number.

1668167 is a deficient number, since it is larger than the sum of its proper divisors (206713).

1668167 is a wasteful number, since it uses less digits than its factorization.

1668167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154.

The product of its digits is 12096, while the sum is 35.

The square root of 1668167 is about 1291.5753946247. The cubic root of 1668167 is about 118.5986763168.

The spelling of 1668167 in words is "one million, six hundred sixty-eight thousand, one hundred sixty-seven".