5671663 has 4 divisors (see below), whose sum is σ = 5713200. Its totient is φ = 5630128.

The previous prime is 5671649. The next prime is 5671669. The reversal of 5671663 is 3661765.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5671663 is a prime.

It is a super-2 number, since 2×5671663² = 64335522371138, which contains 22 as substring.

It is a Duffinian number.

5671663 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5671669) 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, 20563 + ... + 20836.

It is an arithmetic number, because the mean of its divisors is an integer number (1428300).

Almost surely, 2^5671663 is an apocalyptic number.

5671663 is a deficient number, since it is larger than the sum of its proper divisors (41537).

5671663 is a wasteful number, since it uses less digits than its factorization.

5671663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41536.

The product of its digits is 22680, while the sum is 34.

The square root of 5671663 is about 2381.5253515342. The cubic root of 5671663 is about 178.3350902865.

The spelling of 5671663 in words is "five million, six hundred seventy-one thousand, six hundred sixty-three".