6661853 has 8 divisors (see below), whose sum is σ = 7321440. Its totient is φ = 6011280.

The previous prime is 6661849. The next prime is 6661873. The reversal of 6661853 is 3581666.

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

It is not a de Polignac number, because 6661853 - 2² = 6661849 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 (6661873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 650 + ... + 3707.

It is an arithmetic number, because the mean of its divisors is an integer number (915180).

Almost surely, 2^6661853 is an apocalyptic number.

It is an amenable number.

6661853 is a deficient number, since it is larger than the sum of its proper divisors (659587).

6661853 is a wasteful number, since it uses less digits than its factorization.

6661853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4507.

The product of its digits is 25920, while the sum is 35.

The square root of 6661853 is about 2581.0565666021. The cubic root of 6661853 is about 188.1618965316.

The spelling of 6661853 in words is "six million, six hundred sixty-one thousand, eight hundred fifty-three".