1668417 has 8 divisors (see below), whose sum is σ = 2241120. Its totient is φ = 1104000.

The previous prime is 1668379. The next prime is 1668427. The reversal of 1668417 is 7148661.

It is a happy number.

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

It is not a de Polignac number, because 1668417 - 2¹⁴ = 1652033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1668427) 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, 1584 + ... + 2417.

It is an arithmetic number, because the mean of its divisors is an integer number (280140).

2^1668417 is an apocalyptic number.

It is an amenable number.

1668417 is a deficient number, since it is larger than the sum of its proper divisors (572703).

1668417 is a wasteful number, since it uses less digits than its factorization.

1668417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4143.

The product of its digits is 8064, while the sum is 33.

The square root of 1668417 is about 1291.6721720313. The cubic root of 1668417 is about 118.6046006214.

It can be divided in two parts, 1668 and 417, that multiplied together give a square (695556 = 834²).

The spelling of 1668417 in words is "one million, six hundred sixty-eight thousand, four hundred seventeen".