6648667 has 4 divisors (see below), whose sum is σ = 6790176. Its totient is φ = 6507160.

The previous prime is 6648661. The next prime is 6648701. The reversal of 6648667 is 7668466.

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 6648667 - 2¹⁵ = 6615899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6648661) 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, 70684 + ... + 70777.

It is an arithmetic number, because the mean of its divisors is an integer number (1697544).

Almost surely, 2^6648667 is an apocalyptic number.

6648667 is a deficient number, since it is larger than the sum of its proper divisors (141509).

6648667 is a wasteful number, since it uses less digits than its factorization.

6648667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141508.

The product of its digits is 290304, while the sum is 43.

The square root of 6648667 is about 2578.5009210780. The cubic root of 6648667 is about 188.0376697565.

The spelling of 6648667 in words is "six million, six hundred forty-eight thousand, six hundred sixty-seven".