6516663 has 8 divisors (see below), whose sum is σ = 8900976. Its totient is φ = 4238400.

The previous prime is 6516649. The next prime is 6516667. The reversal of 6516663 is 3666156.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6516663 - 2⁴ = 6516647 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

6516663 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6516667) 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, 26368 + ... + 26613.

It is an arithmetic number, because the mean of its divisors is an integer number (1112622).

Almost surely, 2^6516663 is an apocalyptic number.

6516663 is a deficient number, since it is larger than the sum of its proper divisors (2384313).

6516663 is a wasteful number, since it uses less digits than its factorization.

6516663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53025.

The product of its digits is 19440, while the sum is 33.

The square root of 6516663 is about 2552.7755483003. The cubic root of 6516663 is about 186.7848956939.

The spelling of 6516663 in words is "six million, five hundred sixteen thousand, six hundred sixty-three".