66165695 has 8 divisors (see below), whose sum is σ = 83577840. Its totient is φ = 50146560.

The previous prime is 66165689. The next prime is 66165703. The reversal of 66165695 is 59656166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66165695 - 2⁴ = 66165679 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 348146 + ... + 348335.

It is an arithmetic number, because the mean of its divisors is an integer number (10447230).

Almost surely, 2^66165695 is an apocalyptic number.

66165695 is a deficient number, since it is larger than the sum of its proper divisors (17412145).

66165695 is a wasteful number, since it uses less digits than its factorization.

66165695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696505.

The product of its digits is 291600, while the sum is 44.

The square root of 66165695 is about 8134.2298344711. The cubic root of 66165695 is about 404.4619079632.

The spelling of 66165695 in words is "sixty-six million, one hundred sixty-five thousand, six hundred ninety-five".