6660231 has 4 divisors (see below), whose sum is σ = 8880312. Its totient is φ = 4440152.

The previous prime is 6660221. The next prime is 6660233. The reversal of 6660231 is 1320666.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6660231 - 2⁷ = 6660103 is a prime.

It is a super-2 number, since 2×6660231² = 88717353946722, which contains 22 as substring.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6660233) 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, 1110036 + ... + 1110041.

It is an arithmetic number, because the mean of its divisors is an integer number (2220078).

Almost surely, 2^6660231 is an apocalyptic number.

6660231 is a deficient number, since it is larger than the sum of its proper divisors (2220081).

6660231 is a wasteful number, since it uses less digits than its factorization.

6660231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2220080.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 6660231 is about 2580.7423350656. The cubic root of 6660231 is about 188.1466243359.

Adding to 6660231 its reverse (1320666), we get a palindrome (7980897).

The spelling of 6660231 in words is "six million, six hundred sixty thousand, two hundred thirty-one".