6721627 has 4 divisors (see below), whose sum is σ = 7332696. Its totient is φ = 6110560.

The previous prime is 6721609. The next prime is 6721661. The reversal of 6721627 is 7261276.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6721627 - 2¹⁵ = 6688859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6721667) 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 in 3 ways as a sum of consecutive naturals, for example, 305518 + ... + 305539.

It is an arithmetic number, because the mean of its divisors is an integer number (1833174).

Almost surely, 2^6721627 is an apocalyptic number.

6721627 is a deficient number, since it is larger than the sum of its proper divisors (611069).

6721627 is a wasteful number, since it uses less digits than its factorization.

6721627 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611068.

The product of its digits is 7056, while the sum is 31.

The square root of 6721627 is about 2592.6100748088. The cubic root of 6721627 is about 188.7229875236.

The spelling of 6721627 in words is "six million, seven hundred twenty-one thousand, six hundred twenty-seven".