66427636 has 24 divisors (see below), whose sum is σ = 134277696. Its totient is φ = 28417920.

The previous prime is 66427631. The next prime is 66427643. The reversal of 66427636 is 63672466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66427631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43656 + ... + 45151.

It is an arithmetic number, because the mean of its divisors is an integer number (5594904).

Almost surely, 2^66427636 is an apocalyptic number.

It is an amenable number.

66427636 is an abundant number, since it is smaller than the sum of its proper divisors (67850060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66427636 is a wasteful number, since it uses less digits than its factorization.

66427636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88839 (or 88837 counting only the distinct ones).

The product of its digits is 217728, while the sum is 40.

The square root of 66427636 is about 8150.3150859338. The cubic root of 66427636 is about 404.9949417648.

The spelling of 66427636 in words is "sixty-six million, four hundred twenty-seven thousand, six hundred thirty-six".