6644142 has 12 divisors (see below), whose sum is σ = 14395680. Its totient is φ = 2214708.

The previous prime is 6644123. The next prime is 6644147. The reversal of 6644142 is 2414466.

6644142 is a `hidden beast` number, since 6 + 644 + 14 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6644147) 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, 184542 + ... + 184577.

It is an arithmetic number, because the mean of its divisors is an integer number (1199640).

Almost surely, 2^6644142 is an apocalyptic number.

6644142 is an abundant number, since it is smaller than the sum of its proper divisors (7751538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6644142 is a wasteful number, since it uses less digits than its factorization.

6644142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369127 (or 369124 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 6644142 is about 2577.6233239168. The cubic root of 6644142 is about 187.9950013761.

It can be divided in two parts, 6644 and 142, that added together give a triangular number (6786 = T₁₁₆).

The spelling of 6644142 in words is "six million, six hundred forty-four thousand, one hundred forty-two".