66631353 has 4 divisors (see below), whose sum is σ = 88841808. Its totient is φ = 44420900.

The previous prime is 66631343. The next prime is 66631379. The reversal of 66631353 is 35313666.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66631353 - 2⁹ = 66630841 is a prime.

It is a super-2 number, since 2×66631353² = 8879474405221218, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66631343) 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 3 ways as a sum of consecutive naturals, for example, 11105223 + ... + 11105228.

It is an arithmetic number, because the mean of its divisors is an integer number (22210452).

Almost surely, 2^66631353 is an apocalyptic number.

It is an amenable number.

66631353 is a deficient number, since it is larger than the sum of its proper divisors (22210455).

66631353 is a wasteful number, since it uses less digits than its factorization.

66631353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22210454.

The product of its digits is 29160, while the sum is 33.

The square root of 66631353 is about 8162.8030112211. The cubic root of 66631353 is about 405.4085254418.

The spelling of 66631353 in words is "sixty-six million, six hundred thirty-one thousand, three hundred fifty-three".