66066408 has 128 divisors (see below), whose sum is σ = 194400000. Its totient is φ = 20756736.

The previous prime is 66066397. The next prime is 66066431. The reversal of 66066408 is 80466066.

66066408 is a `hidden beast` number, since 6 + 6 + 0 + 6 + 640 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 331893 + ... + 332091.

It is an arithmetic number, because the mean of its divisors is an integer number (1518750).

Almost surely, 2^66066408 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 66066408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97200000).

66066408 is an abundant number, since it is smaller than the sum of its proper divisors (128333592).

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

66066408 is a wasteful number, since it uses less digits than its factorization.

66066408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296 (or 286 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 66066408 is about 8128.1245069204. The cubic root of 66066408 is about 404.2594973691.

The spelling of 66066408 in words is "sixty-six million, sixty-six thousand, four hundred eight".