6657967 has 4 divisors (see below), whose sum is σ = 6767176. Its totient is φ = 6548760.

The previous prime is 6657953. The next prime is 6657979. The reversal of 6657967 is 7697566.

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 6657967 - 2¹¹ = 6655919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6657947) 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, 54513 + ... + 54634.

It is an arithmetic number, because the mean of its divisors is an integer number (1691794).

Almost surely, 2^6657967 is an apocalyptic number.

6657967 is a deficient number, since it is larger than the sum of its proper divisors (109209).

6657967 is a wasteful number, since it uses less digits than its factorization.

6657967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109208.

The product of its digits is 476280, while the sum is 46.

The square root of 6657967 is about 2580.3036643000. The cubic root of 6657967 is about 188.1253031419.

The spelling of 6657967 in words is "six million, six hundred fifty-seven thousand, nine hundred sixty-seven".