66534208 has 56 divisors (see below), whose sum is σ = 143235680. Its totient is φ = 30481920.

The previous prime is 66534203. The next prime is 66534227. The reversal of 66534208 is 80243566.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66534203) 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, 175363 + ... + 175741.

It is an arithmetic number, because the mean of its divisors is an integer number (2557780).

Almost surely, 2^66534208 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 66534208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71617840).

66534208 is an abundant number, since it is smaller than the sum of its proper divisors (76701472).

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

66534208 is a wasteful number, since it uses less digits than its factorization.

66534208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615 (or 605 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 66534208 is about 8156.8503725396. The cubic root of 66534208 is about 405.2114081960.

The spelling of 66534208 in words is "sixty-six million, five hundred thirty-four thousand, two hundred eight".