66033438 has 8 divisors (see below), whose sum is σ = 132066888. Its totient is φ = 22011144.

The previous prime is 66033433. The next prime is 66033481. The reversal of 66033438 is 83433066.

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

66033438 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66033399 and 66033408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66033433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5502781 + ... + 5502792.

It is an arithmetic number, because the mean of its divisors is an integer number (16508361).

Almost surely, 2^66033438 is an apocalyptic number.

66033438 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66033438 is a wasteful number, since it uses less digits than its factorization.

66033438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11005578.

The product of its (nonzero) digits is 31104, while the sum is 33.

The square root of 66033438 is about 8126.0961106795. The cubic root of 66033438 is about 404.1922385114.

The spelling of 66033438 in words is "sixty-six million, thirty-three thousand, four hundred thirty-eight".