66332215 has 8 divisors (see below), whose sum is σ = 84281040. Its totient is φ = 49944192.

The previous prime is 66332197. The next prime is 66332221. The reversal of 66332215 is 51223366.

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 66332215 - 2⁵ = 66332183 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 390105 + ... + 390274.

It is an arithmetic number, because the mean of its divisors is an integer number (10535130).

Almost surely, 2^66332215 is an apocalyptic number.

66332215 is a deficient number, since it is larger than the sum of its proper divisors (17948825).

66332215 is a wasteful number, since it uses less digits than its factorization.

66332215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780401.

The product of its digits is 6480, while the sum is 28.

The square root of 66332215 is about 8144.4591594531. The cubic root of 66332215 is about 404.8009284318.

The spelling of 66332215 in words is "sixty-six million, three hundred thirty-two thousand, two hundred fifteen".