66563795 has 8 divisors (see below), whose sum is σ = 79921296. Its totient is φ = 53221216.

The previous prime is 66563773. The next prime is 66563807. The reversal of 66563795 is 59736566.

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 66563795 - 2¹² = 66559699 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 12569 + ... + 17061.

It is an arithmetic number, because the mean of its divisors is an integer number (9990162).

Almost surely, 2^66563795 is an apocalyptic number.

66563795 is a deficient number, since it is larger than the sum of its proper divisors (13357501).

66563795 is a wasteful number, since it uses less digits than its factorization.

66563795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7461.

The product of its digits is 1020600, while the sum is 47.

The square root of 66563795 is about 8158.6637999123. The cubic root of 66563795 is about 405.2714635851.

The spelling of 66563795 in words is "sixty-six million, five hundred sixty-three thousand, seven hundred ninety-five".