6643011 has 8 divisors (see below), whose sum is σ = 8870224. Its totient is φ = 4422240.

The previous prime is 6642997. The next prime is 6643019. The reversal of 6643011 is 1103466.

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

It is not a de Polignac number, because 6643011 - 2²¹ = 4545859 is a prime.

It is a super-2 number, since 2×6643011² = 88259190292242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6643019) 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, 1881 + ... + 4101.

It is an arithmetic number, because the mean of its divisors is an integer number (1108778).

Almost surely, 2^6643011 is an apocalyptic number.

6643011 is a deficient number, since it is larger than the sum of its proper divisors (2227213).

6643011 is a wasteful number, since it uses less digits than its factorization.

6643011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3221.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 6643011 is about 2577.4039264345. The cubic root of 6643011 is about 187.9843336123.

Adding to 6643011 its reverse (1103466), we get a palindrome (7746477).

The spelling of 6643011 in words is "six million, six hundred forty-three thousand, eleven".