1664027 has 8 divisors (see below), whose sum is σ = 1762560. Its totient is φ = 1567720.

The previous prime is 1664021. The next prime is 1664053. The reversal of 1664027 is 7204661.

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 1664027 - 2⁸ = 1663771 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1663987 and 1664005.

It is not an unprimeable number, because it can be changed into a prime (1664021) 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, 1124 + ... + 2142.

It is an arithmetic number, because the mean of its divisors is an integer number (220320).

2^1664027 is an apocalyptic number.

1664027 is a deficient number, since it is larger than the sum of its proper divisors (98533).

1664027 is a wasteful number, since it uses less digits than its factorization.

1664027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1113.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 1664027 is about 1289.9717051160. The cubic root of 1664027 is about 118.5004836575.

Adding to 1664027 its reverse (7204661), we get a palindrome (8868688).

The spelling of 1664027 in words is "one million, six hundred sixty-four thousand, twenty-seven".