66113556 has 24 divisors (see below), whose sum is σ = 154418880. Its totient is φ = 22015872.

The previous prime is 66113539. The next prime is 66113557. The reversal of 66113556 is 65531166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66113557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13740 + ... + 17916.

It is an arithmetic number, because the mean of its divisors is an integer number (6434120).

Almost surely, 2^66113556 is an apocalyptic number.

It is an amenable number.

66113556 is an abundant number, since it is smaller than the sum of its proper divisors (88305324).

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

66113556 is a wasteful number, since it uses less digits than its factorization.

66113556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5503 (or 5501 counting only the distinct ones).

The product of its digits is 16200, while the sum is 33.

The square root of 66113556 is about 8131.0242897190. The cubic root of 66113556 is about 404.3556405031.

The spelling of 66113556 in words is "sixty-six million, one hundred thirteen thousand, five hundred fifty-six".