66134531 has 4 divisors (see below), whose sum is σ = 66177000. Its totient is φ = 66092064.

The previous prime is 66134507. The next prime is 66134597. The reversal of 66134531 is 13543166.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66134531 is a prime.

It is a super-2 number, since 2×66134531² = 8747552381179922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66134494 and 66134503.

It is not an unprimeable number, because it can be changed into a prime (66131531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18806 + ... + 22043.

It is an arithmetic number, because the mean of its divisors is an integer number (16544250).

Almost surely, 2^66134531 is an apocalyptic number.

66134531 is a deficient number, since it is larger than the sum of its proper divisors (42469).

66134531 is a wasteful number, since it uses less digits than its factorization.

66134531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42468.

The product of its digits is 6480, while the sum is 29.

The square root of 66134531 is about 8132.3140003323. The cubic root of 66134531 is about 404.3983975578.

Adding to 66134531 its reverse (13543166), we get a palindrome (79677697).

The spelling of 66134531 in words is "sixty-six million, one hundred thirty-four thousand, five hundred thirty-one".