66634265 has 16 divisors (see below), whose sum is σ = 81758160. Its totient is φ = 52120320.

The previous prime is 66634241. The next prime is 66634277. The reversal of 66634265 is 56243666.

66634265 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 9193024 + 57441241 = 3032^2 + 7579^2 .

It is not a de Polignac number, because 66634265 - 2⁶ = 66634201 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59531 + ... + 60639.

It is an arithmetic number, because the mean of its divisors is an integer number (5109885).

Almost surely, 2^66634265 is an apocalyptic number.

It is an amenable number.

66634265 is a deficient number, since it is larger than the sum of its proper divisors (15123895).

66634265 is a wasteful number, since it uses less digits than its factorization.

66634265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1372.

The product of its digits is 155520, while the sum is 38.

The square root of 66634265 is about 8162.9813793736. The cubic root of 66634265 is about 405.4144312323.

The spelling of 66634265 in words is "sixty-six million, six hundred thirty-four thousand, two hundred sixty-five".