66681676 has 12 divisors (see below), whose sum is σ = 116794440. Its totient is φ = 33311840.

The previous prime is 66681653. The next prime is 66681677. The reversal of 66681676 is 67618666.

It is not an unprimeable number, because it can be changed into a prime (66681677) 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 3 ways as a sum of consecutive naturals, for example, 1585 + ... + 11656.

It is an arithmetic number, because the mean of its divisors is an integer number (9732870).

Almost surely, 2^66681676 is an apocalyptic number.

It is an amenable number.

66681676 is a deficient number, since it is larger than the sum of its proper divisors (50112764).

66681676 is a wasteful number, since it uses less digits than its factorization.

66681676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14504 (or 14502 counting only the distinct ones).

The product of its digits is 435456, while the sum is 46.

The square root of 66681676 is about 8165.8848877510. The cubic root of 66681676 is about 405.5105606872.

The spelling of 66681676 in words is "sixty-six million, six hundred eighty-one thousand, six hundred seventy-six".