66316805 has 8 divisors (see below), whose sum is σ = 79863072. Its totient is φ = 52864848.

The previous prime is 66316759. The next prime is 66316819. The reversal of 66316805 is 50861366.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66316805 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22019 + ... + 24848.

It is an arithmetic number, because the mean of its divisors is an integer number (9982884).

Almost surely, 2^66316805 is an apocalyptic number.

It is an amenable number.

66316805 is a deficient number, since it is larger than the sum of its proper divisors (13546267).

66316805 is a wasteful number, since it uses less digits than its factorization.

66316805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47155.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 66316805 is about 8143.5130625548. The cubic root of 66316805 is about 404.7695788307.

The spelling of 66316805 in words is "sixty-six million, three hundred sixteen thousand, eight hundred five".