6656929 has 4 divisors (see below), whose sum is σ = 6836884. Its totient is φ = 6476976.

The previous prime is 6656927. The next prime is 6656953. The reversal of 6656929 is 9296566.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9296566 = 2 ⋅4648283.

It can be written as a sum of positive squares in 2 ways, for example, as 5992704 + 664225 = 2448^2 + 815^2 .

It is a cyclic number.

It is not a de Polignac number, because 6656929 - 2¹ = 6656927 is a prime.

It is a super-2 number, since 2×6656929² = 88629407422082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6656927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89922 + ... + 89995.

It is an arithmetic number, because the mean of its divisors is an integer number (1709221).

Almost surely, 2^6656929 is an apocalyptic number.

It is an amenable number.

6656929 is a deficient number, since it is larger than the sum of its proper divisors (179955).

6656929 is a wasteful number, since it uses less digits than its factorization.

6656929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179954.

The product of its digits is 174960, while the sum is 43.

The square root of 6656929 is about 2580.1025173431. The cubic root of 6656929 is about 188.1155261727.

The spelling of 6656929 in words is "six million, six hundred fifty-six thousand, nine hundred twenty-nine".