66505195 has 8 divisors (see below), whose sum is σ = 81312336. Its totient is φ = 52200096.

The previous prime is 66505181. The next prime is 66505217. The reversal of 66505195 is 59150566.

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 66505195 - 2¹⁷ = 66374123 is a prime.

It is a Duffinian 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, 125217 + ... + 125746.

It is an arithmetic number, because the mean of its divisors is an integer number (10164042).

Almost surely, 2^66505195 is an apocalyptic number.

66505195 is a deficient number, since it is larger than the sum of its proper divisors (14807141).

66505195 is a wasteful number, since it uses less digits than its factorization.

66505195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251021.

The product of its (nonzero) digits is 40500, while the sum is 37.

The square root of 66505195 is about 8155.0717348163. The cubic root of 66505195 is about 405.1525006145.

The spelling of 66505195 in words is "sixty-six million, five hundred five thousand, one hundred ninety-five".