6660849 has 32 divisors (see below), whose sum is σ = 10281600. Its totient is φ = 3801600.

The previous prime is 6660809. The next prime is 6660859. The reversal of 6660849 is 9480666.

It is not a de Polignac number, because 6660849 - 2⁷ = 6660721 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6660809) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65899 + ... + 65999.

It is an arithmetic number, because the mean of its divisors is an integer number (321300).

Almost surely, 2^6660849 is an apocalyptic number.

It is an amenable number.

6660849 is a deficient number, since it is larger than the sum of its proper divisors (3620751).

6660849 is a wasteful number, since it uses less digits than its factorization.

6660849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 6660849 is about 2580.8620652797. The cubic root of 6660849 is about 188.1524435043.

The spelling of 6660849 in words is "six million, six hundred sixty thousand, eight hundred forty-nine".