1668607 has 4 divisors (see below), whose sum is σ = 1675080. Its totient is φ = 1662136.

The previous prime is 1668593. The next prime is 1668617. The reversal of 1668607 is 7068661.

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 1668607 - 2⁷ = 1668479 is a prime.

It is a super-3 number, since 3×1668607³ = 13937453717539333629, which contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668617) 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, 2833 + ... + 3370.

It is an arithmetic number, because the mean of its divisors is an integer number (418770).

2^1668607 is an apocalyptic number.

1668607 is a deficient number, since it is larger than the sum of its proper divisors (6473).

1668607 is an equidigital number, since it uses as much as digits as its factorization.

1668607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6472.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 1668607 is about 1291.7457180111. The cubic root of 1668607 is about 118.6091026971.

The spelling of 1668607 in words is "one million, six hundred sixty-eight thousand, six hundred seven".