66404316 has 144 divisors (see below), whose sum is σ = 187689600. Its totient is φ = 18184320.

The previous prime is 66404281. The next prime is 66404321. The reversal of 66404316 is 61340466.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 800011 + ... + 800093.

It is an arithmetic number, because the mean of its divisors is an integer number (1303400).

Almost surely, 2^66404316 is an apocalyptic number.

66404316 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66404316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93844800).

66404316 is an abundant number, since it is smaller than the sum of its proper divisors (121285284).

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

66404316 is a wasteful number, since it uses less digits than its factorization.

66404316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 66404316 is about 8148.8843408162. The cubic root of 66404316 is about 404.9475438844.

The spelling of 66404316 in words is "sixty-six million, four hundred four thousand, three hundred sixteen".