6637601 has 2 divisors, whose sum is σ = 6637602. Its totient is φ = 6637600.

The previous prime is 6637591. The next prime is 6637621. The reversal of 6637601 is 1067366.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5997601 + 640000 = 2449^2 + 800^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6637601 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (6637621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3318800 + 3318801.

It is an arithmetic number, because the mean of its divisors is an integer number (3318801).

Almost surely, 2^6637601 is an apocalyptic number.

It is an amenable number.

6637601 is a deficient number, since it is larger than the sum of its proper divisors (1).

6637601 is an equidigital number, since it uses as much as digits as its factorization.

6637601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 6637601 is about 2576.3542070142. The cubic root of 6637601 is about 187.9332889155.

The spelling of 6637601 in words is "six million, six hundred thirty-seven thousand, six hundred one".