66783762 has 12 divisors (see below), whose sum is σ = 144698190. Its totient is φ = 22261248.

The previous prime is 66783749. The next prime is 66783767. The reversal of 66783762 is 26738766.

66783762 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 60980481 + 5803281 = 7809^2 + 2409^2 .

It is not an unprimeable number, because it can be changed into a prime (66783767) 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 5 ways as a sum of consecutive naturals, for example, 1855087 + ... + 1855122.

Almost surely, 2^66783762 is an apocalyptic number.

66783762 is an abundant number, since it is smaller than the sum of its proper divisors (77914428).

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

66783762 is a wasteful number, since it uses less digits than its factorization.

66783762 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3710217 (or 3710214 counting only the distinct ones).

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

The square root of 66783762 is about 8172.1332588254. The cubic root of 66783762 is about 405.7173933387.

It can be divided in two parts, 6678 and 3762, that added together give a triangular number (10440 = T₁₄₄).

The spelling of 66783762 in words is "sixty-six million, seven hundred eighty-three thousand, seven hundred sixty-two".