66602239 has 8 divisors (see below), whose sum is σ = 76481280. Its totient is φ = 57360600.

The previous prime is 66602233. The next prime is 66602251. The reversal of 66602239 is 93220666.

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

It is not a de Polignac number, because 66602239 - 2¹⁹ = 66077951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66602233) 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, 159127 + ... + 159544.

It is an arithmetic number, because the mean of its divisors is an integer number (9560160).

Almost surely, 2^66602239 is an apocalyptic number.

66602239 is a deficient number, since it is larger than the sum of its proper divisors (9879041).

66602239 is a wasteful number, since it uses less digits than its factorization.

66602239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318701.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 66602239 is about 8161.0194828833. The cubic root of 66602239 is about 405.3494702434.

The spelling of 66602239 in words is "sixty-six million, six hundred two thousand, two hundred thirty-nine".