6663257 has 2 divisors, whose sum is σ = 6663258. Its totient is φ = 6663256.

The previous prime is 6663229. The next prime is 6663289. The reversal of 6663257 is 7523666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6370576 + 292681 = 2524^2 + 541^2 .

It is a cyclic number.

It is not a de Polignac number, because 6663257 - 2⁶ = 6663193 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6663227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3331628 + 3331629.

It is an arithmetic number, because the mean of its divisors is an integer number (3331629).

Almost surely, 2^6663257 is an apocalyptic number.

It is an amenable number.

6663257 is a deficient number, since it is larger than the sum of its proper divisors (1).

6663257 is an equidigital number, since it uses as much as digits as its factorization.

6663257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 35.

The square root of 6663257 is about 2581.3285339143. The cubic root of 6663257 is about 188.1751141127.

The spelling of 6663257 in words is "six million, six hundred sixty-three thousand, two hundred fifty-seven".