66783276 has 162 divisors, whose sum is σ = 210197988. Its totient is φ = 17821440.

The previous prime is 66783263. The next prime is 66783281. The reversal of 66783276 is 67238766.

66783276 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

Its product of digits (508032) is a multiple of the sum of its prime factors (189).

It is an unprimeable number.

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 53 ways as a sum of consecutive naturals, for example, 509731 + ... + 509861.

Almost surely, 2^66783276 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 66783276, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105098994).

66783276 is an abundant number, since it is smaller than the sum of its proper divisors (143414712).

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

66783276 is a wasteful number, since it uses less digits than its factorization.

66783276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189 (or 160 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The square root of 66783276 is about 8172.1035235734. The cubic root of 66783276 is about 405.7164091717.

The spelling of 66783276 in words is "sixty-six million, seven hundred eighty-three thousand, two hundred seventy-six".