1667011 has 4 divisors (see below), whose sum is σ = 1670032. Its totient is φ = 1663992.

The previous prime is 1666999. The next prime is 1667033. The reversal of 1667011 is 1107661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1107661 = 31 ⋅35731.

It is a cyclic number.

It is not a de Polignac number, because 1667011 - 2⁹ = 1666499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1667051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 420 + ... + 1873.

It is an arithmetic number, because the mean of its divisors is an integer number (417508).

2^1667011 is an apocalyptic number.

1667011 is a deficient number, since it is larger than the sum of its proper divisors (3021).

1667011 is an equidigital number, since it uses as much as digits as its factorization.

1667011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3020.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 1667011 is about 1291.1278015750. The cubic root of 1667011 is about 118.5712746336.

The spelling of 1667011 in words is "one million, six hundred sixty-seven thousand, eleven".