6661744 has 10 divisors (see below), whose sum is σ = 12907160. Its totient is φ = 3330864.

The previous prime is 6661741. The next prime is 6661747. The reversal of 6661744 is 4471666.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6661741) and next prime (6661747).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6661741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 208164 + ... + 208195.

It is an arithmetic number, because the mean of its divisors is an integer number (1290716).

Almost surely, 2^6661744 is an apocalyptic number.

It is an amenable number.

6661744 is a deficient number, since it is larger than the sum of its proper divisors (6245416).

6661744 is a wasteful number, since it uses less digits than its factorization.

6661744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416367 (or 416361 counting only the distinct ones).

The product of its digits is 24192, while the sum is 34.

The square root of 6661744 is about 2581.0354511320. The cubic root of 6661744 is about 188.1608703027.

The spelling of 6661744 in words is "six million, six hundred sixty-one thousand, seven hundred forty-four".