66789514 has 16 divisors (see below), whose sum is σ = 112247136. Its totient is φ = 29538000.

The previous prime is 66789497. The next prime is 66789517. The reversal of 66789514 is 41598766.

66789514 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (66789517) 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 7 ways as a sum of consecutive naturals, for example, 40212 + ... + 41839.

It is an arithmetic number, because the mean of its divisors is an integer number (7015446).

Almost surely, 2^66789514 is an apocalyptic number.

66789514 is a deficient number, since it is larger than the sum of its proper divisors (45457622).

66789514 is a wasteful number, since it uses less digits than its factorization.

66789514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82101.

The product of its digits is 362880, while the sum is 46.

The square root of 66789514 is about 8172.4851789404. The cubic root of 66789514 is about 405.7290409777.

The spelling of 66789514 in words is "sixty-six million, seven hundred eighty-nine thousand, five hundred fourteen".