6661384 has 8 divisors (see below), whose sum is σ = 12490110. Its totient is φ = 3330688.

The previous prime is 6661379. The next prime is 6661409. The reversal of 6661384 is 4831666.

It can be written as a sum of positive squares in only one way, i.e., 5616900 + 1044484 = 2370^2 + 1022^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 416329 + ... + 416344.

Almost surely, 2^6661384 is an apocalyptic number.

It is an amenable number.

6661384 is a deficient number, since it is larger than the sum of its proper divisors (5828726).

6661384 is a wasteful number, since it uses less digits than its factorization.

6661384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832679 (or 832675 counting only the distinct ones).

The product of its digits is 20736, while the sum is 34.

The square root of 6661384 is about 2580.9657107370. The cubic root of 6661384 is about 188.1574808433.

The spelling of 6661384 in words is "six million, six hundred sixty-one thousand, three hundred eighty-four".