66783734 has 12 divisors (see below), whose sum is σ = 103514292. Its totient is φ = 32313780.

The previous prime is 66783733. The next prime is 66783749. The reversal of 66783734 is 43738766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66783733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15452 + ... + 19295.

It is an arithmetic number, because the mean of its divisors is an integer number (8626191).

Almost surely, 2^66783734 is an apocalyptic number.

66783734 is a deficient number, since it is larger than the sum of its proper divisors (36730558).

66783734 is a wasteful number, since it uses less digits than its factorization.

66783734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34811 (or 34780 counting only the distinct ones).

The product of its digits is 508032, while the sum is 44.

The square root of 66783734 is about 8172.1315456862. The cubic root of 66783734 is about 405.7173366379.

The spelling of 66783734 in words is "sixty-six million, seven hundred eighty-three thousand, seven hundred thirty-four".