6662749 has 8 divisors (see below), whose sum is σ = 7057440. Its totient is φ = 6272496.

The previous prime is 6662743. The next prime is 6662753. The reversal of 6662749 is 9472666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6662749 - 2³ = 6662741 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 (6662741) 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 7 ways as a sum of consecutive naturals, for example, 2274 + ... + 4300.

It is an arithmetic number, because the mean of its divisors is an integer number (882180).

Almost surely, 2^6662749 is an apocalyptic number.

It is an amenable number.

6662749 is a deficient number, since it is larger than the sum of its proper divisors (394691).

6662749 is a wasteful number, since it uses less digits than its factorization.

6662749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2219.

The product of its digits is 108864, while the sum is 40.

The square root of 6662749 is about 2581.2301330955. The cubic root of 6662749 is about 188.1703318975.

The spelling of 6662749 in words is "six million, six hundred sixty-two thousand, seven hundred forty-nine".