66328765 has 8 divisors (see below), whose sum is σ = 80339040. Its totient is φ = 52566672.

The previous prime is 66328733. The next prime is 66328783. The reversal of 66328765 is 56782366.

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

It is a cyclic number.

It is not a de Polignac number, because 66328765 - 2⁵ = 66328733 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61455 + ... + 62524.

It is an arithmetic number, because the mean of its divisors is an integer number (10042380).

Almost surely, 2^66328765 is an apocalyptic number.

It is an amenable number.

66328765 is a deficient number, since it is larger than the sum of its proper divisors (14010275).

66328765 is a wasteful number, since it uses less digits than its factorization.

66328765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124091.

The product of its digits is 362880, while the sum is 43.

The square root of 66328765 is about 8144.2473562632. The cubic root of 66328765 is about 404.7939102862.

The spelling of 66328765 in words is "sixty-six million, three hundred twenty-eight thousand, seven hundred sixty-five".