66205145 has 8 divisors (see below), whose sum is σ = 79578240. Its totient is φ = 52876080.

The previous prime is 66205129. The next prime is 66205147. The reversal of 66205145 is 54150266.

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

It is not a de Polignac number, because 66205145 - 2⁴ = 66205129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66205147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7601 + ... + 13790.

It is an arithmetic number, because the mean of its divisors is an integer number (9947280).

Almost surely, 2^66205145 is an apocalyptic number.

It is an amenable number.

66205145 is a deficient number, since it is larger than the sum of its proper divisors (13373095).

66205145 is a wasteful number, since it uses less digits than its factorization.

66205145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22015.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 66205145 is about 8136.6544107514. The cubic root of 66205145 is about 404.5422761569.

The spelling of 66205145 in words is "sixty-six million, two hundred five thousand, one hundred forty-five".