66489703 has 16 divisors (see below), whose sum is σ = 82638144. Its totient is φ = 52185600.

The previous prime is 66489701. The next prime is 66489713. The reversal of 66489703 is 30798466.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 66489703 - 2¹ = 66489701 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66489703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66489701) 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 15 ways as a sum of consecutive naturals, for example, 3148 + ... + 11953.

It is an arithmetic number, because the mean of its divisors is an integer number (5164884).

Almost surely, 2^66489703 is an apocalyptic number.

66489703 is a deficient number, since it is larger than the sum of its proper divisors (16148441).

66489703 is a wasteful number, since it uses less digits than its factorization.

66489703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15162.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 66489703 is about 8154.1218411304. The cubic root of 66489703 is about 405.1210388619.

The spelling of 66489703 in words is "sixty-six million, four hundred eighty-nine thousand, seven hundred three".