66056287 has 8 divisors (see below), whose sum is σ = 74546640. Its totient is φ = 57980160.

The previous prime is 66056281. The next prime is 66056317. The reversal of 66056287 is 78265066.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66056287 - 2³ = 66056279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66056281) 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 7 ways as a sum of consecutive naturals, for example, 103218 + ... + 103855.

It is an arithmetic number, because the mean of its divisors is an integer number (9318330).

Almost surely, 2^66056287 is an apocalyptic number.

66056287 is a deficient number, since it is larger than the sum of its proper divisors (8490353).

66056287 is a wasteful number, since it uses less digits than its factorization.

66056287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207113.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 66056287 is about 8127.5018917254. The cubic root of 66056287 is about 404.2388528921.

The spelling of 66056287 in words is "sixty-six million, fifty-six thousand, two hundred eighty-seven".