6645101 has 4 divisors (see below), whose sum is σ = 6650400. Its totient is φ = 6639804.

The previous prime is 6645083. The next prime is 6645131. The reversal of 6645101 is 1015466.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6645101 - 2¹⁴ = 6628717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6645131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 410 + ... + 3668.

It is an arithmetic number, because the mean of its divisors is an integer number (1662600).

Almost surely, 2^6645101 is an apocalyptic number.

It is an amenable number.

6645101 is a deficient number, since it is larger than the sum of its proper divisors (5299).

6645101 is a wasteful number, since it uses less digits than its factorization.

6645101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5298.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 6645101 is about 2577.8093412819. The cubic root of 6645101 is about 188.0040458613.

The spelling of 6645101 in words is "six million, six hundred forty-five thousand, one hundred one".