66065642 has 16 divisors (see below), whose sum is σ = 101492352. Its totient is φ = 32244240.

The previous prime is 66065627. The next prime is 66065651. The reversal of 66065642 is 24656066.

66065642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 12368 + ... + 16884.

It is an arithmetic number, because the mean of its divisors is an integer number (6343272).

Almost surely, 2^66065642 is an apocalyptic number.

66065642 is a deficient number, since it is larger than the sum of its proper divisors (35426710).

66065642 is a wasteful number, since it uses less digits than its factorization.

66065642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4693.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 66065642 is about 8128.0773864426. The cubic root of 66065642 is about 404.2579349817.

The spelling of 66065642 in words is "sixty-six million, sixty-five thousand, six hundred forty-two".