6638967 has 6 divisors (see below), whose sum is σ = 9589632. Its totient is φ = 4425972.

The previous prime is 6638953. The next prime is 6638977. The reversal of 6638967 is 7698366.

6638967 is a `hidden beast` number, since 6 + 638 + 9 + 6 + 7 = 666.

It is not a de Polignac number, because 6638967 - 2⁶ = 6638903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6638977) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 368823 + ... + 368840.

It is an arithmetic number, because the mean of its divisors is an integer number (1598272).

Almost surely, 2^6638967 is an apocalyptic number.

6638967 is a deficient number, since it is larger than the sum of its proper divisors (2950665).

6638967 is a wasteful number, since it uses less digits than its factorization.

6638967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737669 (or 737666 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 6638967 is about 2576.6192966754. The cubic root of 6638967 is about 187.9461800823.

The spelling of 6638967 in words is "six million, six hundred thirty-eight thousand, nine hundred sixty-seven".