1664016 has 20 divisors (see below), whose sum is σ = 4298832. Its totient is φ = 554656.

The previous prime is 1664009. The next prime is 1664017. The reversal of 1664016 is 6104661.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (1664017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17286 + ... + 17381.

2^1664016 is an apocalyptic number.

1664016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1664016 is an abundant number, since it is smaller than the sum of its proper divisors (2634816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1664016 is a wasteful number, since it uses less digits than its factorization.

1664016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34678 (or 34672 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 1664016 is about 1289.9674414496. The cubic root of 1664016 is about 118.5002225423.

Adding to 1664016 its reverse (6104661), we get a palindrome (7768677).

The spelling of 1664016 in words is "one million, six hundred sixty-four thousand, sixteen".