1668367 has 8 divisors (see below), whose sum is σ = 1741616. Its totient is φ = 1596672.

The previous prime is 1668361. The next prime is 1668379. The reversal of 1668367 is 7638661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1668367 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

1668367 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2143 + ... + 2815.

It is an arithmetic number, because the mean of its divisors is an integer number (217702).

2^1668367 is an apocalyptic number.

1668367 is a deficient number, since it is larger than the sum of its proper divisors (73249).

1668367 is an equidigital number, since it uses as much as digits as its factorization.

1668367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777.

The product of its digits is 36288, while the sum is 37.

The square root of 1668367 is about 1291.6528171301. The cubic root of 1668367 is about 118.6034158078.

The spelling of 1668367 in words is "one million, six hundred sixty-eight thousand, three hundred sixty-seven".