6657671 has 2 divisors, whose sum is σ = 6657672. Its totient is φ = 6657670.

The previous prime is 6657667. The next prime is 6657697. The reversal of 6657671 is 1767566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6657671 - 2² = 6657667 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6657631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3328835 + 3328836.

It is an arithmetic number, because the mean of its divisors is an integer number (3328836).

Almost surely, 2^6657671 is an apocalyptic number.

6657671 is a deficient number, since it is larger than the sum of its proper divisors (1).

6657671 is an equidigital number, since it uses as much as digits as its factorization.

6657671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52920, while the sum is 38.

The square root of 6657671 is about 2580.2463060723. The cubic root of 6657671 is about 188.1225152080.

The spelling of 6657671 in words is "six million, six hundred fifty-seven thousand, six hundred seventy-one".