6656201 has 2 divisors, whose sum is σ = 6656202. Its totient is φ = 6656200.

The previous prime is 6656183. The next prime is 6656239. The reversal of 6656201 is 1026566.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6130576 + 525625 = 2476^2 + 725^2 .

It is a cyclic number.

It is not a de Polignac number, because 6656201 - 2¹⁴ = 6639817 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (6656261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3328100 + 3328101.

It is an arithmetic number, because the mean of its divisors is an integer number (3328101).

Almost surely, 2^6656201 is an apocalyptic number.

It is an amenable number.

6656201 is a deficient number, since it is larger than the sum of its proper divisors (1).

6656201 is an equidigital number, since it uses as much as digits as its factorization.

6656201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 6656201 is about 2579.9614338203. The cubic root of 6656201 is about 188.1086685013.

The spelling of 6656201 in words is "six million, six hundred fifty-six thousand, two hundred one".