66153730 has 16 divisors (see below), whose sum is σ = 119246904. Its totient is φ = 26423680.

The previous prime is 66153701. The next prime is 66153751. The reversal of 66153730 is 3735166.

66153730 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 4 ways, for example, as 13111641 + 53042089 = 3621^2 + 7283^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66153692 and 66153701.

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 7 ways as a sum of consecutive naturals, for example, 3264 + ... + 11956.

Almost surely, 2^66153730 is an apocalyptic number.

66153730 is a deficient number, since it is larger than the sum of its proper divisors (53093174).

66153730 is a wasteful number, since it uses less digits than its factorization.

66153730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9461.

The product of its (nonzero) digits is 11340, while the sum is 31.

The square root of 66153730 is about 8133.4943290077. The cubic root of 66153730 is about 404.4375263535.

Adding to 66153730 its reverse (3735166), we get a palindrome (69888896).

The spelling of 66153730 in words is "sixty-six million, one hundred fifty-three thousand, seven hundred thirty".