66393744 has 20 divisors (see below), whose sum is σ = 171517296. Its totient is φ = 22131232.

The previous prime is 66393727. The next prime is 66393749. The reversal of 66393744 is 44739366.

66393744 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 66393696 and 66393705.

It is not an unprimeable number, because it can be changed into a prime (66393749) 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 3 ways as a sum of consecutive naturals, for example, 691554 + ... + 691649.

Almost surely, 2^66393744 is an apocalyptic number.

It is an amenable number.

66393744 is an abundant number, since it is smaller than the sum of its proper divisors (105123552).

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

66393744 is a wasteful number, since it uses less digits than its factorization.

66393744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1383214 (or 1383208 counting only the distinct ones).

The product of its digits is 326592, while the sum is 42.

The square root of 66393744 is about 8148.2356372407. The cubic root of 66393744 is about 404.9260526475.

The spelling of 66393744 in words is "sixty-six million, three hundred ninety-three thousand, seven hundred forty-four".