66889141 has 4 divisors (see below), whose sum is σ = 72969984. Its totient is φ = 60808300.

The previous prime is 66889117. The next prime is 66889157. The reversal of 66889141 is 14198866.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66889141 - 2⁹ = 66888629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66889541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3040405 + ... + 3040426.

It is an arithmetic number, because the mean of its divisors is an integer number (18242496).

Almost surely, 2^66889141 is an apocalyptic number.

It is an amenable number.

66889141 is a deficient number, since it is larger than the sum of its proper divisors (6080843).

66889141 is a wasteful number, since it uses less digits than its factorization.

66889141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6080842.

The product of its digits is 82944, while the sum is 43.

The square root of 66889141 is about 8178.5781771650. The cubic root of 66889141 is about 405.9306768485.

It can be divided in two parts, 66889 and 141, that multiplied together give a palindrome (9431349).

The spelling of 66889141 in words is "sixty-six million, eight hundred eighty-nine thousand, one hundred forty-one".