1616664 has 32 divisors (see below), whose sum is σ = 4619520. Its totient is φ = 461856.

The previous prime is 1616651. The next prime is 1616669. The reversal of 1616664 is 4666161.

It is a super-2 number, since 2×1616664² = 5227204977792, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1616669) 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, 4644 + ... + 4979.

It is an arithmetic number, because the mean of its divisors is an integer number (144360).

2^1616664 is an apocalyptic number.

1616664 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1616664 is an abundant number, since it is smaller than the sum of its proper divisors (3002856).

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

1616664 is a wasteful number, since it uses less digits than its factorization.

1616664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9639 (or 9635 counting only the distinct ones).

The product of its digits is 5184, while the sum is 30.

The square root of 1616664 is about 1271.4810262053. The cubic root of 1616664 is about 117.3653565600.

The spelling of 1616664 in words is "one million, six hundred sixteen thousand, six hundred sixty-four".