6747621 has 4 divisors (see below), whose sum is σ = 8996832. Its totient is φ = 4498412.

The previous prime is 6747619. The next prime is 6747667. The reversal of 6747621 is 1267476.

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 6747621 - 2¹ = 6747619 is a prime.

It is a D-number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6747421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1124601 + ... + 1124606.

It is an arithmetic number, because the mean of its divisors is an integer number (2249208).

Almost surely, 2^6747621 is an apocalyptic number.

It is an amenable number.

6747621 is a deficient number, since it is larger than the sum of its proper divisors (2249211).

6747621 is a wasteful number, since it uses less digits than its factorization.

6747621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2249210.

The product of its digits is 14112, while the sum is 33.

The square root of 6747621 is about 2597.6183322421. The cubic root of 6747621 is about 188.9659522666.

The spelling of 6747621 in words is "six million, seven hundred forty-seven thousand, six hundred twenty-one".