66454360 has 128 divisors (see below), whose sum is σ = 189112320. Its totient is φ = 20477952.

The previous prime is 66454327. The next prime is 66454369. The reversal of 66454360 is 6345466.

66454360 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66454369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109177 + ... + 109783.

It is an arithmetic number, because the mean of its divisors is an integer number (1477440).

Almost surely, 2^66454360 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 66454360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94556160).

66454360 is an abundant number, since it is smaller than the sum of its proper divisors (122657960).

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

66454360 is a wasteful number, since it uses less digits than its factorization.

66454360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665 (or 661 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 66454360 is about 8151.9543668988. The cubic root of 66454360 is about 405.0492446344.

The spelling of 66454360 in words is "sixty-six million, four hundred fifty-four thousand, three hundred sixty".