66239612 has 12 divisors (see below), whose sum is σ = 118106856. Its totient is φ = 32494800.

The previous prime is 66239603. The next prime is 66239629. The reversal of 66239612 is 21693266.

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 3 ways as a sum of consecutive naturals, for example, 156014 + ... + 156437.

It is an arithmetic number, because the mean of its divisors is an integer number (9842238).

Almost surely, 2^66239612 is an apocalyptic number.

It is an amenable number.

66239612 is a deficient number, since it is larger than the sum of its proper divisors (51867244).

66239612 is a wasteful number, since it uses less digits than its factorization.

66239612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312508 (or 312506 counting only the distinct ones).

The product of its digits is 23328, while the sum is 35.

The square root of 66239612 is about 8138.7721432658. The cubic root of 66239612 is about 404.6124667725.

The spelling of 66239612 in words is "sixty-six million, two hundred thirty-nine thousand, six hundred twelve".