66504889 has 8 divisors (see below), whose sum is σ = 74891520. Its totient is φ = 58508400.

The previous prime is 66504881. The next prime is 66504899. The reversal of 66504889 is 98840566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66504889 - 2³ = 66504881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66504881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97174 + ... + 97855.

It is an arithmetic number, because the mean of its divisors is an integer number (9361440).

Almost surely, 2^66504889 is an apocalyptic number.

It is an amenable number.

66504889 is a deficient number, since it is larger than the sum of its proper divisors (8386631).

66504889 is a wasteful number, since it uses less digits than its factorization.

66504889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195071.

The product of its (nonzero) digits is 414720, while the sum is 46.

The square root of 66504889 is about 8155.0529734638. The cubic root of 66504889 is about 405.1518792252.

The spelling of 66504889 in words is "sixty-six million, five hundred four thousand, eight hundred eighty-nine".