6660901 has 8 divisors (see below), whose sum is σ = 7348824. Its totient is φ = 5998080.

The previous prime is 6660859. The next prime is 6660911. The reversal of 6660901 is 1090666.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 30276 + 6630625 = 174^2 + 2575^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6660901 - 2⁹ = 6660389 is a prime.

It is a Duffinian number.

6660901 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6660901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6660911) 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 in 7 ways as a sum of consecutive naturals, for example, 5716 + ... + 6781.

It is an arithmetic number, because the mean of its divisors is an integer number (918603).

Almost surely, 2^6660901 is an apocalyptic number.

It is an amenable number.

6660901 is a deficient number, since it is larger than the sum of its proper divisors (687923).

6660901 is a wasteful number, since it uses less digits than its factorization.

6660901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12551.

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

The square root of 6660901 is about 2580.8721394133. The cubic root of 6660901 is about 188.1529331267.

The spelling of 6660901 in words is "six million, six hundred sixty thousand, nine hundred one".