66205265 has 8 divisors (see below), whose sum is σ = 90795840. Its totient is φ = 45397872.

The previous prime is 66205241. The next prime is 66205273. The reversal of 66205265 is 56250266.

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 66205265 - 2¹⁶ = 66139729 is a prime.

It is a super-2 number, since 2×66205265² = 8766274227440450, which contains 22 as substring.

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, 945755 + ... + 945824.

It is an arithmetic number, because the mean of its divisors is an integer number (11349480).

Almost surely, 2^66205265 is an apocalyptic number.

It is an amenable number.

66205265 is a deficient number, since it is larger than the sum of its proper divisors (24590575).

66205265 is a wasteful number, since it uses less digits than its factorization.

66205265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1891591.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 66205265 is about 8136.6617847862. The cubic root of 66205265 is about 404.5425205741.

The spelling of 66205265 in words is "sixty-six million, two hundred five thousand, two hundred sixty-five".