6601901 has 4 divisors (see below), whose sum is σ = 6692412. Its totient is φ = 6511392.

The previous prime is 6601891. The next prime is 6601909. The reversal of 6601901 is 1091066.

6601901 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1091066 = 2 ⋅545533.

It can be written as a sum of positive squares in 2 ways, for example, as 2399401 + 4202500 = 1549^2 + 2050^2 .

It is a cyclic number.

It is not a de Polignac number, because 6601901 - 2¹⁴ = 6585517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6601909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45146 + ... + 45291.

It is an arithmetic number, because the mean of its divisors is an integer number (1673103).

Almost surely, 2^6601901 is an apocalyptic number.

It is an amenable number.

6601901 is a deficient number, since it is larger than the sum of its proper divisors (90511).

6601901 is an equidigital number, since it uses as much as digits as its factorization.

6601901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90510.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 6601901 is about 2569.4164707186. The cubic root of 6601901 is about 187.5957531662.

Adding to 6601901 its reverse (1091066), we get a palindrome (7692967).

The spelling of 6601901 in words is "six million, six hundred one thousand, nine hundred one".