66602238 has 16 divisors (see below), whose sum is σ = 135718416. Its totient is φ = 21781760.

The previous prime is 66602233. The next prime is 66602251. The reversal of 66602238 is 83220666.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 66602199 and 66602208.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104403 + ... + 105038.

It is an arithmetic number, because the mean of its divisors is an integer number (8482401).

Almost surely, 2^66602238 is an apocalyptic number.

66602238 is an abundant number, since it is smaller than the sum of its proper divisors (69116178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66602238 is a wasteful number, since it uses less digits than its factorization.

66602238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209499.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 66602238 is about 8161.0194216164. The cubic root of 66602238 is about 405.3494682147.

The spelling of 66602238 in words is "sixty-six million, six hundred two thousand, two hundred thirty-eight".