6706649 has 4 divisors (see below), whose sum is σ = 6787536. Its totient is φ = 6625764.

The previous prime is 6706631. The next prime is 6706669. The reversal of 6706649 is 9466076.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6706649 - 2⁸ = 6706393 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6706669) 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 3 ways as a sum of consecutive naturals, for example, 40319 + ... + 40484.

It is an arithmetic number, because the mean of its divisors is an integer number (1696884).

Almost surely, 2^6706649 is an apocalyptic number.

It is an amenable number.

6706649 is a deficient number, since it is larger than the sum of its proper divisors (80887).

6706649 is an equidigital number, since it uses as much as digits as its factorization.

6706649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80886.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 6706649 is about 2589.7198690206. The cubic root of 6706649 is about 188.5827042702.

The spelling of 6706649 in words is "six million, seven hundred six thousand, six hundred forty-nine".