66761121 has 16 divisors (see below), whose sum is σ = 102115328. Its totient is φ = 38005200.

The previous prime is 66761119. The next prime is 66761129. The reversal of 66761121 is 12116766.

It is not a de Polignac number, because 66761121 - 2¹ = 66761119 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66761129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175 + ... + 11556.

It is an arithmetic number, because the mean of its divisors is an integer number (6382208).

Almost surely, 2^66761121 is an apocalyptic number.

It is an amenable number.

66761121 is a deficient number, since it is larger than the sum of its proper divisors (35354207).

66761121 is a wasteful number, since it uses less digits than its factorization.

66761121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12012.

The product of its digits is 3024, while the sum is 30.

The square root of 66761121 is about 8170.7478849858. The cubic root of 66761121 is about 405.6715394491.

Adding to 66761121 its reverse (12116766), we get a palindrome (78877887).

The spelling of 66761121 in words is "sixty-six million, seven hundred sixty-one thousand, one hundred twenty-one".