6643101 has 4 divisors (see below), whose sum is σ = 8857472. Its totient is φ = 4428732.

The previous prime is 6643097. The next prime is 6643111. The reversal of 6643101 is 1013466.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 6643101 - 2² = 6643097 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6643111) 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, 1107181 + ... + 1107186.

It is an arithmetic number, because the mean of its divisors is an integer number (2214368).

Almost surely, 2^6643101 is an apocalyptic number.

It is an amenable number.

6643101 is a deficient number, since it is larger than the sum of its proper divisors (2214371).

6643101 is a wasteful number, since it uses less digits than its factorization.

6643101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2214370.

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

The square root of 6643101 is about 2577.4213858040. The cubic root of 6643101 is about 187.9851825503.

Adding to 6643101 its reverse (1013466), we get a palindrome (7656567).

The spelling of 6643101 in words is "six million, six hundred forty-three thousand, one hundred one".