66032531 has 8 divisors (see below), whose sum is σ = 68059824. Its totient is φ = 64018080.

The previous prime is 66032521. The next prime is 66032557. The reversal of 66032531 is 13523066.

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

It is a cyclic number.

It is not a de Polignac number, because 66032531 - 2¹⁰ = 66031507 is a prime.

It is a super-2 number, since 2×66032531² = 8720590300531922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66032531.

It is not an unprimeable number, because it can be changed into a prime (66032501) 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 7 ways as a sum of consecutive naturals, for example, 7796 + ... + 13886.

It is an arithmetic number, because the mean of its divisors is an integer number (8507478).

Almost surely, 2^66032531 is an apocalyptic number.

66032531 is a deficient number, since it is larger than the sum of its proper divisors (2027293).

66032531 is a wasteful number, since it uses less digits than its factorization.

66032531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6421.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 66032531 is about 8126.0403026320. The cubic root of 66032531 is about 404.1903879135.

Adding to 66032531 its reverse (13523066), we get a palindrome (79555597).

The spelling of 66032531 in words is "sixty-six million, thirty-two thousand, five hundred thirty-one".