1668331 has 8 divisors (see below), whose sum is σ = 1953504. Its totient is φ = 1394880.

The previous prime is 1668323. The next prime is 1668347. The reversal of 1668331 is 1338661.

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

It is a cyclic number.

It is not a de Polignac number, because 1668331 - 2³ = 1668323 is a prime.

It is a super-2 number, since 2×1668331² = 5566656651122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1668331.

It is not an unprimeable number, because it can be changed into a prime (1668301) 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 7 ways as a sum of consecutive naturals, for example, 2620 + ... + 3193.

It is an arithmetic number, because the mean of its divisors is an integer number (244188).

2^1668331 is an apocalyptic number.

1668331 is a deficient number, since it is larger than the sum of its proper divisors (285173).

1668331 is an equidigital number, since it uses as much as digits as its factorization.

1668331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5861.

The product of its digits is 2592, while the sum is 28.

The square root of 1668331 is about 1291.6388814216. The cubic root of 1668331 is about 118.6025627274.

The spelling of 1668331 in words is "one million, six hundred sixty-eight thousand, three hundred thirty-one".