66519934 has 16 divisors (see below), whose sum is σ = 107866080. Its totient is φ = 30584160.

The previous prime is 66519923. The next prime is 66519953. The reversal of 66519934 is 43991566.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2239 + ... + 11749.

It is an arithmetic number, because the mean of its divisors is an integer number (6741630).

Almost surely, 2^66519934 is an apocalyptic number.

66519934 is a deficient number, since it is larger than the sum of its proper divisors (41346146).

66519934 is a wasteful number, since it uses less digits than its factorization.

66519934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9795.

The product of its digits is 174960, while the sum is 43.

The square root of 66519934 is about 8155.9753555292. The cubic root of 66519934 is about 405.1824286105.

The spelling of 66519934 in words is "sixty-six million, five hundred nineteen thousand, nine hundred thirty-four".