1668497 has 8 divisors (see below), whose sum is σ = 1712256. Its totient is φ = 1625472.

The previous prime is 1668481. The next prime is 1668503. The reversal of 1668497 is 7948661.

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 1668497 - 2⁴ = 1668481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1668427) 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 7 ways as a sum of consecutive naturals, for example, 9908 + ... + 10074.

It is an arithmetic number, because the mean of its divisors is an integer number (214032).

2^1668497 is an apocalyptic number.

It is an amenable number.

1668497 is a deficient number, since it is larger than the sum of its proper divisors (43759).

1668497 is a wasteful number, since it uses less digits than its factorization.

1668497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367.

The product of its digits is 72576, while the sum is 41.

The square root of 1668497 is about 1291.7031392700. The cubic root of 1668497 is about 118.6064962739.

The spelling of 1668497 in words is "one million, six hundred sixty-eight thousand, four hundred ninety-seven".