6660931 has 2 divisors, whose sum is σ = 6660932. Its totient is φ = 6660930.

The previous prime is 6660919. The next prime is 6660937. The reversal of 6660931 is 1390666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6660931 - 2⁹ = 6660419 is a prime.

It is a super-2 number, since 2×6660931² = 88736003573522, which contains 22 as substring.

It is a Chen prime.

6660931 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6660893 and 6660902.

It is not a weakly prime, because it can be changed into another prime (6660937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3330465 + 3330466.

It is an arithmetic number, because the mean of its divisors is an integer number (3330466).

Almost surely, 2^6660931 is an apocalyptic number.

6660931 is a deficient number, since it is larger than the sum of its proper divisors (1).

6660931 is an equidigital number, since it uses as much as digits as its factorization.

6660931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 6660931 is about 2580.8779513956. The cubic root of 6660931 is about 188.1532155999.

The spelling of 6660931 in words is "six million, six hundred sixty thousand, nine hundred thirty-one".