6690601 has 2 divisors, whose sum is σ = 6690602. Its totient is φ = 6690600.

The previous prime is 6690587. The next prime is 6690611. The reversal of 6690601 is 1060966.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6255001 + 435600 = 2501^2 + 660^2 .

It is a cyclic number.

It is not a de Polignac number, because 6690601 - 2⁵ = 6690569 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6690601.

It is not a weakly prime, because it can be changed into another prime (6690611) 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 as a sum of consecutive naturals, namely, 3345300 + 3345301.

It is an arithmetic number, because the mean of its divisors is an integer number (3345301).

Almost surely, 2^6690601 is an apocalyptic number.

It is an amenable number.

6690601 is a deficient number, since it is larger than the sum of its proper divisors (1).

6690601 is an equidigital number, since it uses as much as digits as its factorization.

6690601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 6690601 is about 2586.6196086785. The cubic root of 6690601 is about 188.4321674751.

The spelling of 6690601 in words is "six million, six hundred ninety thousand, six hundred one".