66442134 has 32 divisors (see below), whose sum is σ = 145276416. Its totient is φ = 20090720.

The previous prime is 66442133. The next prime is 66442151. The reversal of 66442134 is 43124466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66442133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43939 + ... + 45425.

It is an arithmetic number, because the mean of its divisors is an integer number (4539888).

Almost surely, 2^66442134 is an apocalyptic number.

66442134 is an abundant number, since it is smaller than the sum of its proper divisors (78834282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66442134 is a wasteful number, since it uses less digits than its factorization.

66442134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2180.

The product of its digits is 13824, while the sum is 30.

The square root of 66442134 is about 8151.2044508772. The cubic root of 66442134 is about 405.0244033459.

It can be divided in two parts, 6644 and 2134, that added together give a palindrome (8778).

The spelling of 66442134 in words is "sixty-six million, four hundred forty-two thousand, one hundred thirty-four".