66067531 has 4 divisors (see below), whose sum is σ = 66096000. Its totient is φ = 66039064.

The previous prime is 66067517. The next prime is 66067553. The reversal of 66067531 is 13576066.

It is a happy number.

66067531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 66067531 - 2⁹ = 66067019 is a prime.

It is a super-2 number, since 2×66067531² = 8729837304871922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66067591) 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 3 ways as a sum of consecutive naturals, for example, 10411 + ... + 15508.

It is an arithmetic number, because the mean of its divisors is an integer number (16524000).

Almost surely, 2^66067531 is an apocalyptic number.

66067531 is a deficient number, since it is larger than the sum of its proper divisors (28469).

66067531 is a wasteful number, since it uses less digits than its factorization.

66067531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28468.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 66067531 is about 8128.1935877537. The cubic root of 66067531 is about 404.2617878970.

The spelling of 66067531 in words is "sixty-six million, sixty-seven thousand, five hundred thirty-one".