66115293 has 8 divisors (see below), whose sum is σ = 88259328. Its totient is φ = 44024064.

The previous prime is 66115289. The next prime is 66115321. The reversal of 66115293 is 39251166.

It is a happy number.

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

It is not a de Polignac number, because 66115293 - 2² = 66115289 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66115993) 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, 10180 + ... + 15357.

It is an arithmetic number, because the mean of its divisors is an integer number (11032416).

Almost surely, 2^66115293 is an apocalyptic number.

It is an amenable number.

66115293 is a deficient number, since it is larger than the sum of its proper divisors (22144035).

66115293 is a wasteful number, since it uses less digits than its factorization.

66115293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26403.

The product of its digits is 9720, while the sum is 33.

The square root of 66115293 is about 8131.1311021284. The cubic root of 66115293 is about 404.3591816810.

The spelling of 66115293 in words is "sixty-six million, one hundred fifteen thousand, two hundred ninety-three".