6645141 has 6 divisors (see below), whose sum is σ = 9598550. Its totient is φ = 4430088.

The previous prime is 6645139. The next prime is 6645151. The reversal of 6645141 is 1415466.

6645141 is a `hidden beast` number, since 6 + 645 + 14 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3721041 + 2924100 = 1929^2 + 1710^2 .

It is not a de Polignac number, because 6645141 - 2¹ = 6645139 is a prime.

It is a Duffinian number.

It is a Curzon 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 polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 369166 + ... + 369183.

Almost surely, 2^6645141 is an apocalyptic number.

It is an amenable number.

6645141 is a deficient number, since it is larger than the sum of its proper divisors (2953409).

6645141 is a wasteful number, since it uses less digits than its factorization.

6645141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738355 (or 738352 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 6645141 is about 2577.8170997959. The cubic root of 6645141 is about 188.0044230889.

It can be divided in two parts, 6645 and 141, that added together give a triangular number (6786 = T₁₁₆).

The spelling of 6645141 in words is "six million, six hundred forty-five thousand, one hundred forty-one".