66384783 has 6 divisors (see below), whose sum is σ = 95889144. Its totient is φ = 44256516.

The previous prime is 66384767. The next prime is 66384817. The reversal of 66384783 is 38748366.

66384783 is a `hidden beast` number, since 6 + 638 + 4 + 7 + 8 + 3 = 666.

It is not a de Polignac number, because 66384783 - 2⁴ = 66384767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66384713) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3688035 + ... + 3688052.

It is an arithmetic number, because the mean of its divisors is an integer number (15981524).

Almost surely, 2^66384783 is an apocalyptic number.

66384783 is a deficient number, since it is larger than the sum of its proper divisors (29504361).

66384783 is a wasteful number, since it uses less digits than its factorization.

66384783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7376093 (or 7376090 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 66384783 is about 8147.6857450444. The cubic root of 66384783 is about 404.9078345374.

The spelling of 66384783 in words is "sixty-six million, three hundred eighty-four thousand, seven hundred eighty-three".