6662671 has 2 divisors, whose sum is σ = 6662672. Its totient is φ = 6662670.

The previous prime is 6662651. The next prime is 6662707. The reversal of 6662671 is 1762666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6662671 - 2⁷ = 6662543 is a prime.

6662671 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6662641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3331335 + 3331336.

It is an arithmetic number, because the mean of its divisors is an integer number (3331336).

Almost surely, 2^6662671 is an apocalyptic number.

6662671 is a deficient number, since it is larger than the sum of its proper divisors (1).

6662671 is an equidigital number, since it uses as much as digits as its factorization.

6662671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 34.

The square root of 6662671 is about 2581.2150239761. The cubic root of 6662671 is about 188.1695975988.

The spelling of 6662671 in words is "six million, six hundred sixty-two thousand, six hundred seventy-one".