2167667 has 4 divisors (see below), whose sum is σ = 2171496. Its totient is φ = 2163840.

The previous prime is 2167661. The next prime is 2167703. The reversal of 2167667 is 7667612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2167667 - 2¹² = 2163571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2167661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 878 + ... + 2259.

It is an arithmetic number, because the mean of its divisors is an integer number (542874).

2^2167667 is an apocalyptic number.

2167667 is a deficient number, since it is larger than the sum of its proper divisors (3829).

2167667 is an equidigital number, since it uses as much as digits as its factorization.

2167667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3828.

The product of its digits is 21168, while the sum is 35.

The square root of 2167667 is about 1472.2999015146. The cubic root of 2167667 is about 129.4188457112.

Subtracting 2167667 from its reverse (7667612), we obtain a palindrome (5499945).

The spelling of 2167667 in words is "two million, one hundred sixty-seven thousand, six hundred sixty-seven".