6661131 has 8 divisors (see below), whose sum is σ = 8893440. Its totient is φ = 4434792.

The previous prime is 6661117. The next prime is 6661141. The reversal of 6661131 is 1311666.

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

It is not a de Polignac number, because 6661131 - 2¹⁷ = 6530059 is a prime.

It is a super-2 number, since 2×6661131² = 88741332398322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6661111) 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, 3546 + ... + 5088.

It is an arithmetic number, because the mean of its divisors is an integer number (1111680).

Almost surely, 2^6661131 is an apocalyptic number.

6661131 is a deficient number, since it is larger than the sum of its proper divisors (2232309).

6661131 is a wasteful number, since it uses less digits than its factorization.

6661131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2985.

The product of its digits is 648, while the sum is 24.

The square root of 6661131 is about 2580.9166976096. The cubic root of 6661131 is about 188.1550987334.

Adding to 6661131 its reverse (1311666), we get a palindrome (7972797).

The spelling of 6661131 in words is "six million, six hundred sixty-one thousand, one hundred thirty-one".