66135069 has 64 divisors (see below), whose sum is σ = 131604480. Its totient is φ = 31700160.

The previous prime is 66135061. The next prime is 66135071. The reversal of 66135069 is 96053166.

66135069 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66135069 - 2³ = 66135061 is a prime.

It is a super-2 number, since 2×66135069² = 8747694703269522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66135061) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 25804 + ... + 28250.

It is an arithmetic number, because the mean of its divisors is an integer number (2056320).

Almost surely, 2^66135069 is an apocalyptic number.

It is an amenable number.

66135069 is a deficient number, since it is larger than the sum of its proper divisors (65469411).

66135069 is a wasteful number, since it uses less digits than its factorization.

66135069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2487 (or 2481 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 66135069 is about 8132.3470781811. The cubic root of 66135069 is about 404.3994941395.

The spelling of 66135069 in words is "sixty-six million, one hundred thirty-five thousand, sixty-nine".