66333736 has 64 divisors (see below), whose sum is σ = 147329280. Its totient is φ = 27409920.

The previous prime is 66333721. The next prime is 66333737. The reversal of 66333736 is 63733366.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 66333695 and 66333704.

It is not an unprimeable number, because it can be changed into a prime (66333737) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 383346 + ... + 383518.

It is an arithmetic number, because the mean of its divisors is an integer number (2302020).

Almost surely, 2^66333736 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 66333736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73664640).

66333736 is an abundant number, since it is smaller than the sum of its proper divisors (80995544).

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

66333736 is a wasteful number, since it uses less digits than its factorization.

66333736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394 (or 390 counting only the distinct ones).

The product of its digits is 122472, while the sum is 37.

The square root of 66333736 is about 8144.5525352839. The cubic root of 66333736 is about 404.8040224412.

The spelling of 66333736 in words is "sixty-six million, three hundred thirty-three thousand, seven hundred thirty-six".