6661201 has 4 divisors (see below), whose sum is σ = 6745600. Its totient is φ = 6576804.

The previous prime is 6661189. The next prime is 6661211. The reversal of 6661201 is 1021666.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6661201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6661211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42081 + ... + 42238.

It is an arithmetic number, because the mean of its divisors is an integer number (1686400).

Almost surely, 2^6661201 is an apocalyptic number.

It is an amenable number.

6661201 is a deficient number, since it is larger than the sum of its proper divisors (84399).

6661201 is an equidigital number, since it uses as much as digits as its factorization.

6661201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84398.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 6661201 is about 2580.9302586471. The cubic root of 6661201 is about 188.1557578212.

Adding to 6661201 its reverse (1021666), we get a palindrome (7682867).

The spelling of 6661201 in words is "six million, six hundred sixty-one thousand, two hundred one".