6666597 has 24 divisors (see below), whose sum is σ = 11491200. Its totient is φ = 3808728.

The previous prime is 6666593. The next prime is 6666599. The reversal of 6666597 is 7956666.

It is not a de Polignac number, because 6666597 - 2² = 6666593 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6666593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1197 + ... + 3842.

It is an arithmetic number, because the mean of its divisors is an integer number (478800).

Almost surely, 2^6666597 is an apocalyptic number.

It is an amenable number.

6666597 is a deficient number, since it is larger than the sum of its proper divisors (4824603).

6666597 is a wasteful number, since it uses less digits than its factorization.

6666597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5062 (or 5049 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The square root of 6666597 is about 2581.9754065444. The cubic root of 6666597 is about 188.2065501855.

It can be divided in two parts, 666659 and 7, that added together give a palindrome (666666).

The spelling of 6666597 in words is "six million, six hundred sixty-six thousand, five hundred ninety-seven".