66272785 has 8 divisors (see below), whose sum is σ = 79845696. Its totient is φ = 52806000.

The previous prime is 66272719. The next prime is 66272797. The reversal of 66272785 is 58727266.

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

It is not a de Polignac number, because 66272785 - 2¹⁵ = 66240017 is a prime.

It is a Duffinian 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, 25149 + ... + 27658.

It is an arithmetic number, because the mean of its divisors is an integer number (9980712).

Almost surely, 2^66272785 is an apocalyptic number.

It is an amenable number.

66272785 is a deficient number, since it is larger than the sum of its proper divisors (13572911).

66272785 is a wasteful number, since it uses less digits than its factorization.

66272785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53063.

The product of its digits is 282240, while the sum is 43.

The square root of 66272785 is about 8140.8098491489. The cubic root of 66272785 is about 404.6799992200.

The spelling of 66272785 in words is "sixty-six million, two hundred seventy-two thousand, seven hundred eighty-five".