6665243 has 4 divisors (see below), whose sum is σ = 7177968. Its totient is φ = 6152520.

The previous prime is 6665237. The next prime is 6665249. The reversal of 6665243 is 3425666.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (6665237) and next prime (6665249).

It is a cyclic number.

It is not a de Polignac number, because 6665243 - 2⁶ = 6665179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6665249) 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, 256343 + ... + 256368.

It is an arithmetic number, because the mean of its divisors is an integer number (1794492).

Almost surely, 2^6665243 is an apocalyptic number.

6665243 is a deficient number, since it is larger than the sum of its proper divisors (512725).

6665243 is a wasteful number, since it uses less digits than its factorization.

6665243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512724.

The product of its digits is 25920, while the sum is 32.

The square root of 6665243 is about 2581.7131908870. The cubic root of 6665243 is about 188.1938076062.

The spelling of 6665243 in words is "six million, six hundred sixty-five thousand, two hundred forty-three".