66441883 has 4 divisors (see below), whose sum is σ = 66687328. Its totient is φ = 66196440.

The previous prime is 66441877. The next prime is 66441887. The reversal of 66441883 is 38814466.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66441883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66441887) 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, 122316 + ... + 122857.

It is an arithmetic number, because the mean of its divisors is an integer number (16671832).

Almost surely, 2^66441883 is an apocalyptic number.

66441883 is a deficient number, since it is larger than the sum of its proper divisors (245445).

66441883 is a wasteful number, since it uses less digits than its factorization.

66441883 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245444.

The product of its digits is 110592, while the sum is 40.

The square root of 66441883 is about 8151.1890543650. The cubic root of 66441883 is about 405.0238933219.

The spelling of 66441883 in words is "sixty-six million, four hundred forty-one thousand, eight hundred eighty-three".