66305265 has 16 divisors (see below), whose sum is σ = 114249408. Its totient is φ = 32642496.

The previous prime is 66305263. The next prime is 66305329. The reversal of 66305265 is 56250366.

It is not a de Polignac number, because 66305265 - 2¹ = 66305263 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66305263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169819 + ... + 170208.

It is an arithmetic number, because the mean of its divisors is an integer number (7140588).

Almost surely, 2^66305265 is an apocalyptic number.

66305265 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

66305265 is a deficient number, since it is larger than the sum of its proper divisors (47944143).

66305265 is a wasteful number, since it uses less digits than its factorization.

66305265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340048.

The product of its (nonzero) digits is 32400, while the sum is 33.

The square root of 66305265 is about 8142.8044923110. The cubic root of 66305265 is about 404.7460990511.

The spelling of 66305265 in words is "sixty-six million, three hundred five thousand, two hundred sixty-five".