66087140 has 24 divisors (see below), whose sum is σ = 158609472. Its totient is φ = 22658400.

The previous prime is 66087137. The next prime is 66087157. The reversal of 66087140 is 4178066.

66087140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 66087097 and 66087106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235886 + ... + 236165.

It is an arithmetic number, because the mean of its divisors is an integer number (6608728).

Almost surely, 2^66087140 is an apocalyptic number.

It is an amenable number.

66087140 is an abundant number, since it is smaller than the sum of its proper divisors (92522332).

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

66087140 is a wasteful number, since it uses less digits than its factorization.

66087140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472067 (or 472065 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 66087140 is about 8129.3997318375. The cubic root of 66087140 is about 404.3017792268.

The spelling of 66087140 in words is "sixty-six million, eighty-seven thousand, one hundred forty".