66459744 has 192 divisors, whose sum is σ = 214361280. Its totient is φ = 19906560.

The previous prime is 66459727. The next prime is 66459751. The reversal of 66459744 is 44795466.

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 66459744.

It is a congruent number.

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, 685104 + ... + 685200.

It is an arithmetic number, because the mean of its divisors is an integer number (1116465).

Almost surely, 2^66459744 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 66459744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107180640).

66459744 is an abundant number, since it is smaller than the sum of its proper divisors (147901536).

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

66459744 is a wasteful number, since it uses less digits than its factorization.

66459744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190 (or 176 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 66459744 is about 8152.2845877705. The cubic root of 66459744 is about 405.0601831002.

The spelling of 66459744 in words is "sixty-six million, four hundred fifty-nine thousand, seven hundred forty-four".