66872673 has 48 divisors (see below), whose sum is σ = 115454976. Its totient is φ = 36495360.

The previous prime is 66872671. The next prime is 66872677. The reversal of 66872673 is 37627866.

It is not a de Polignac number, because 66872673 - 2¹ = 66872671 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66872671) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 189265 + ... + 189617.

It is an arithmetic number, because the mean of its divisors is an integer number (2405312).

Almost surely, 2^66872673 is an apocalyptic number.

66872673 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

66872673 is a deficient number, since it is larger than the sum of its proper divisors (48582303).

66872673 is a wasteful number, since it uses less digits than its factorization.

66872673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494 (or 491 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The square root of 66872673 is about 8177.5713387289. The cubic root of 66872673 is about 405.8973609522.

The spelling of 66872673 in words is "sixty-six million, eight hundred seventy-two thousand, six hundred seventy-three".