66395331 has 6 divisors (see below), whose sum is σ = 95904380. Its totient is φ = 44263548.

The previous prime is 66395317. The next prime is 66395339. The reversal of 66395331 is 13359366.

It is not a de Polignac number, because 66395331 - 2⁵ = 66395299 is a prime.

It is a super-2 number, since 2×66395331² = 8816679957199122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66395339) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3688621 + ... + 3688638.

Almost surely, 2^66395331 is an apocalyptic number.

66395331 is a deficient number, since it is larger than the sum of its proper divisors (29509049).

66395331 is a wasteful number, since it uses less digits than its factorization.

66395331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7377265 (or 7377262 counting only the distinct ones).

The product of its digits is 43740, while the sum is 36.

The square root of 66395331 is about 8148.3330197041. Note that the first 3 decimals coincide. The cubic root of 66395331 is about 404.9292789180.

The spelling of 66395331 in words is "sixty-six million, three hundred ninety-five thousand, three hundred thirty-one".