667127287 has 8 divisors (see below), whose sum is σ = 670325904. Its totient is φ = 663936768.

The previous prime is 667127273. The next prime is 667127291. The reversal of 667127287 is 782721766.

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

It is a cyclic number.

It is not a de Polignac number, because 667127287 - 2¹⁹ = 666602999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667127207) 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 7 ways as a sum of consecutive naturals, for example, 214848 + ... + 217930.

It is an arithmetic number, because the mean of its divisors is an integer number (83790738).

Almost surely, 2^667127287 is an apocalyptic number.

667127287 is a deficient number, since it is larger than the sum of its proper divisors (3198617).

667127287 is a wasteful number, since it uses less digits than its factorization.

667127287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4049.

The product of its digits is 395136, while the sum is 46.

The square root of 667127287 is about 25828.8073088945. The cubic root of 667127287 is about 873.7816128794.

The spelling of 667127287 in words is "six hundred sixty-seven million, one hundred twenty-seven thousand, two hundred eighty-seven".