66666236 has 48 divisors (see below), whose sum is σ = 149850624. Its totient is φ = 25223616.

The previous prime is 66666227. The next prime is 66666239. The reversal of 66666236 is 63266666.

It is a super-3 number, since 3×66666236³ (a number of 24 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66666193 and 66666202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66666239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4391 + ... + 12353.

It is an arithmetic number, because the mean of its divisors is an integer number (3121888).

Almost surely, 2^66666236 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66666236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74925312).

66666236 is an abundant number, since it is smaller than the sum of its proper divisors (83184388).

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

66666236 is a wasteful number, since it uses less digits than its factorization.

66666236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8010 (or 8008 counting only the distinct ones).

The product of its digits is 279936, while the sum is 41.

The square root of 66666236 is about 8164.9394363951. The cubic root of 66666236 is about 405.4792599025.

The spelling of 66666236 in words is "sixty-six million, six hundred sixty-six thousand, two hundred thirty-six".