1616663 has 8 divisors (see below), whose sum is σ = 1691280. Its totient is φ = 1543360.

The previous prime is 1616651. The next prime is 1616669. The reversal of 1616663 is 3666161.

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 1616663 - 2¹⁴ = 1600279 is a prime.

It is a super-2 number, since 2×1616663² = 5227198511138, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2843 + ... + 3363.

It is an arithmetic number, because the mean of its divisors is an integer number (211410).

2^1616663 is an apocalyptic number.

1616663 is a deficient number, since it is larger than the sum of its proper divisors (74617).

1616663 is a wasteful number, since it uses less digits than its factorization.

1616663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657.

The product of its digits is 3888, while the sum is 29.

The square root of 1616663 is about 1271.4806329630. The cubic root of 1616663 is about 117.3653323609.

The spelling of 1616663 in words is "one million, six hundred sixteen thousand, six hundred sixty-three".