66064989 has 8 divisors (see below), whose sum is σ = 88144672. Its totient is φ = 44014320.

The previous prime is 66064969. The next prime is 66064991. The reversal of 66064989 is 98946066.

66064989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 66064989 - 2⁹ = 66064477 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 (66064909) 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 7 ways as a sum of consecutive naturals, for example, 1222 + ... + 11559.

It is an arithmetic number, because the mean of its divisors is an integer number (11018084).

Almost surely, 2^66064989 is an apocalyptic number.

It is an amenable number.

66064989 is a deficient number, since it is larger than the sum of its proper divisors (22079683).

66064989 is a wasteful number, since it uses less digits than its factorization.

66064989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14507.

The product of its (nonzero) digits is 559872, while the sum is 48.

The square root of 66064989 is about 8128.0372169424. The cubic root of 66064989 is about 404.2566030675.

The spelling of 66064989 in words is "sixty-six million, sixty-four thousand, nine hundred eighty-nine".