66676871 has 8 divisors (see below), whose sum is σ = 70262400. Its totient is φ = 63099000.

The previous prime is 66676861. The next prime is 66676889. The reversal of 66676871 is 17867666.

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

It is not a de Polignac number, because 66676871 - 2⁶ = 66676807 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 (66676811) 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, 28496 + ... + 30746.

It is an arithmetic number, because the mean of its divisors is an integer number (8782800).

Almost surely, 2^66676871 is an apocalyptic number.

66676871 is a deficient number, since it is larger than the sum of its proper divisors (3585529).

66676871 is a wasteful number, since it uses less digits than its factorization.

66676871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3829.

The product of its digits is 508032, while the sum is 47.

The square root of 66676871 is about 8165.5906706129. The cubic root of 66676871 is about 405.5008202550.

The spelling of 66676871 in words is "sixty-six million, six hundred seventy-six thousand, eight hundred seventy-one".