66772255 has 16 divisors (see below), whose sum is σ = 88470144. Its totient is φ = 47973280.

The previous prime is 66772253. The next prime is 66772271. The reversal of 66772255 is 55227766.

It is not a de Polignac number, because 66772255 - 2¹ = 66772253 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66772253) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2749 + ... + 11878.

It is an arithmetic number, because the mean of its divisors is an integer number (5529384).

Almost surely, 2^66772255 is an apocalyptic number.

66772255 is a deficient number, since it is larger than the sum of its proper divisors (21697889).

66772255 is a wasteful number, since it uses less digits than its factorization.

66772255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14726.

The product of its digits is 176400, while the sum is 40.

The square root of 66772255 is about 8171.4291895604. The cubic root of 66772255 is about 405.6940899784.

The spelling of 66772255 in words is "sixty-six million, seven hundred seventy-two thousand, two hundred fifty-five".