6664597 has 4 divisors (see below), whose sum is σ = 6879616. Its totient is φ = 6449580.

The previous prime is 6664571. The next prime is 6664607. The reversal of 6664597 is 7954666.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6664597 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 (6664517) 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, 107463 + ... + 107524.

It is an arithmetic number, because the mean of its divisors is an integer number (1719904).

Almost surely, 2^6664597 is an apocalyptic number.

It is an amenable number.

6664597 is a deficient number, since it is larger than the sum of its proper divisors (215019).

6664597 is a wasteful number, since it uses less digits than its factorization.

6664597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215018.

The product of its digits is 272160, while the sum is 43.

The square root of 6664597 is about 2581.5880771339. The cubic root of 6664597 is about 188.1877274514.

The spelling of 6664597 in words is "six million, six hundred sixty-four thousand, five hundred ninety-seven".