66627687 has 8 divisors (see below), whose sum is σ = 101527936. Its totient is φ = 38072952.

The previous prime is 66627679. The next prime is 66627689. The reversal of 66627687 is 78672666.

It is a happy number.

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

It is not a de Polignac number, because 66627687 - 2³ = 66627679 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 (66627689) 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, 1586353 + ... + 1586394.

It is an arithmetic number, because the mean of its divisors is an integer number (12690992).

Almost surely, 2^66627687 is an apocalyptic number.

66627687 is a deficient number, since it is larger than the sum of its proper divisors (34900249).

66627687 is a wasteful number, since it uses less digits than its factorization.

66627687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3172757.

The product of its digits is 1016064, while the sum is 48.

The square root of 66627687 is about 8162.5784529155. The cubic root of 66627687 is about 405.4010902288.

The spelling of 66627687 in words is "sixty-six million, six hundred twenty-seven thousand, six hundred eighty-seven".