66545165 has 8 divisors (see below), whose sum is σ = 80028000. Its totient is φ = 53120272.

The previous prime is 66545159. The next prime is 66545177. The reversal of 66545165 is 56154566.

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-66545165 is a prime.

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, 11915 + ... + 16584.

It is an arithmetic number, because the mean of its divisors is an integer number (10003500).

Almost surely, 2^66545165 is an apocalyptic number.

It is an amenable number.

66545165 is a deficient number, since it is larger than the sum of its proper divisors (13482835).

66545165 is a wasteful number, since it uses less digits than its factorization.

66545165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28971.

The product of its digits is 108000, while the sum is 38.

The square root of 66545165 is about 8157.5219889376. The cubic root of 66545165 is about 405.2336506776.

The spelling of 66545165 in words is "sixty-six million, five hundred forty-five thousand, one hundred sixty-five".