66187256 has 16 divisors (see below), whose sum is σ = 131401440. Its totient is φ = 31146880.

The previous prime is 66187249. The next prime is 66187259. The reversal of 66187256 is 65278166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66187259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243200 + ... + 243471.

It is an arithmetic number, because the mean of its divisors is an integer number (8212590).

Almost surely, 2^66187256 is an apocalyptic number.

It is an amenable number.

66187256 is a deficient number, since it is larger than the sum of its proper divisors (65214184).

66187256 is a wasteful number, since it uses less digits than its factorization.

66187256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486694 (or 486690 counting only the distinct ones).

The product of its digits is 120960, while the sum is 41.

The square root of 66187256 is about 8135.5550517466. Note that the first 3 decimals coincide. The cubic root of 66187256 is about 404.5058363470.

The spelling of 66187256 in words is "sixty-six million, one hundred eighty-seven thousand, two hundred fifty-six".