6660249 has 4 divisors (see below), whose sum is σ = 8880336. Its totient is φ = 4440164.

The previous prime is 6660239. The next prime is 6660287. The reversal of 6660249 is 9420666.

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 not a de Polignac number, because 6660249 - 2⁴ = 6660233 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (6660239) 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, 1110039 + ... + 1110044.

It is an arithmetic number, because the mean of its divisors is an integer number (2220084).

Almost surely, 2^6660249 is an apocalyptic number.

It is an amenable number.

6660249 is a deficient number, since it is larger than the sum of its proper divisors (2220087).

6660249 is a wasteful number, since it uses less digits than its factorization.

6660249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2220086.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 6660249 is about 2580.7458224320. The cubic root of 6660249 is about 188.1467938313.

The spelling of 6660249 in words is "six million, six hundred sixty thousand, two hundred forty-nine".