66404352 has 120 divisors (see below), whose sum is σ = 203417536. Its totient is φ = 18874368.

The previous prime is 66404347. The next prime is 66404353. The reversal of 66404352 is 25340466.

It is a nialpdrome in base 4.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66404353) 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, 343968 + ... + 344160.

Almost surely, 2^66404352 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 66404352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101708768).

66404352 is an abundant number, since it is smaller than the sum of its proper divisors (137013184).

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

66404352 is an equidigital number, since it uses as much as digits as its factorization.

66404352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 66404352 is about 8148.8865497073. The cubic root of 66404352 is about 404.9476170629.

The spelling of 66404352 in words is "sixty-six million, four hundred four thousand, three hundred fifty-two".