66880131 has 4 divisors (see below), whose sum is σ = 89173512. Its totient is φ = 44586752.

The previous prime is 66880129. The next prime is 66880141. The reversal of 66880131 is 13108866.

66880131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66880131 - 2¹ = 66880129 is a prime.

It is a super-2 number, since 2×66880131² = 8945903845154322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66880092 and 66880101.

It is not an unprimeable number, because it can be changed into a prime (66880141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11146686 + ... + 11146691.

It is an arithmetic number, because the mean of its divisors is an integer number (22293378).

Almost surely, 2^66880131 is an apocalyptic number.

66880131 is a deficient number, since it is larger than the sum of its proper divisors (22293381).

66880131 is a wasteful number, since it uses less digits than its factorization.

66880131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22293380.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 66880131 is about 8178.0273293747. The cubic root of 66880131 is about 405.9124496765.

Adding to 66880131 its reverse (13108866), we get a palindrome (79988997).

The spelling of 66880131 in words is "sixty-six million, eight hundred eighty thousand, one hundred thirty-one".