667276027 has 12 divisors (see below), whose sum is σ = 771165576. Its totient is φ = 570629120.

The previous prime is 667276013. The next prime is 667276031. The reversal of 667276027 is 720672766.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-667276027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667276007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 352299 + ... + 354187.

It is an arithmetic number, because the mean of its divisors is an integer number (64263798).

Almost surely, 2^667276027 is an apocalyptic number.

667276027 is a deficient number, since it is larger than the sum of its proper divisors (103889549).

667276027 is an equidigital number, since it uses as much as digits as its factorization.

667276027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3806 (or 1917 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 43.

The square root of 667276027 is about 25831.6864915940. The cubic root of 667276027 is about 873.8465463246.

The spelling of 667276027 in words is "six hundred sixty-seven million, two hundred seventy-six thousand, twenty-seven".