66134865 has 8 divisors (see below), whose sum is σ = 105815808. Its totient is φ = 35271920.

The previous prime is 66134863. The next prime is 66134897. The reversal of 66134865 is 56843166.

66134865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 66134865 - 2¹ = 66134863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66134863) 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 7 ways as a sum of consecutive naturals, for example, 2204481 + ... + 2204510.

It is an arithmetic number, because the mean of its divisors is an integer number (13226976).

Almost surely, 2^66134865 is an apocalyptic number.

It is an amenable number.

66134865 is a deficient number, since it is larger than the sum of its proper divisors (39680943).

66134865 is a wasteful number, since it uses less digits than its factorization.

66134865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4408999.

The product of its digits is 103680, while the sum is 39.

The square root of 66134865 is about 8132.3345356669. The cubic root of 66134865 is about 404.3990783360.

The spelling of 66134865 in words is "sixty-six million, one hundred thirty-four thousand, eight hundred sixty-five".