6656977 has 2 divisors, whose sum is σ = 6656978. Its totient is φ = 6656976.

The previous prime is 6656963. The next prime is 6656981. The reversal of 6656977 is 7796566.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4977361 + 1679616 = 2231^2 + 1296^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6656977 is a prime.

It is not a weakly prime, because it can be changed into another prime (6656917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3328488 + 3328489.

It is an arithmetic number, because the mean of its divisors is an integer number (3328489).

Almost surely, 2^6656977 is an apocalyptic number.

It is an amenable number.

6656977 is a deficient number, since it is larger than the sum of its proper divisors (1).

6656977 is an equidigital number, since it uses as much as digits as its factorization.

6656977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 476280, while the sum is 46.

The square root of 6656977 is about 2580.1118192823. Note that the first 3 decimals coincide. The cubic root of 6656977 is about 188.1159783093.

The spelling of 6656977 in words is "six million, six hundred fifty-six thousand, nine hundred seventy-seven".