66235215 has 8 divisors (see below), whose sum is σ = 105976368. Its totient is φ = 35325440.

The previous prime is 66235207. The next prime is 66235219. The reversal of 66235215 is 51253266.

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

It is not a de Polignac number, because 66235215 - 2³ = 66235207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66235219) 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, 2207826 + ... + 2207855.

It is an arithmetic number, because the mean of its divisors is an integer number (13247046).

Almost surely, 2^66235215 is an apocalyptic number.

66235215 is a deficient number, since it is larger than the sum of its proper divisors (39741153).

66235215 is a wasteful number, since it uses less digits than its factorization.

66235215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4415689.

The product of its digits is 10800, while the sum is 30.

The square root of 66235215 is about 8138.5020120413. The cubic root of 66235215 is about 404.6035138196.

The spelling of 66235215 in words is "sixty-six million, two hundred thirty-five thousand, two hundred fifteen".