66286705 has 16 divisors (see below), whose sum is σ = 80990784. Its totient is φ = 52073280.

The previous prime is 66286697. The next prime is 66286739. The reversal of 66286705 is 50768266.

It is not a de Polignac number, because 66286705 - 2³ = 66286697 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87187 + ... + 87943.

It is an arithmetic number, because the mean of its divisors is an integer number (5061924).

Almost surely, 2^66286705 is an apocalyptic number.

It is an amenable number.

66286705 is a deficient number, since it is larger than the sum of its proper divisors (14704079).

66286705 is a wasteful number, since it uses less digits than its factorization.

66286705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056.

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

The square root of 66286705 is about 8141.6647560557. The cubic root of 66286705 is about 404.7083303629.

The spelling of 66286705 in words is "sixty-six million, two hundred eighty-six thousand, seven hundred five".