66489087 has 16 divisors (see below), whose sum is σ = 102216960. Its totient is φ = 37656192.

The previous prime is 66489061. The next prime is 66489097. The reversal of 66489087 is 78098466.

It is not a de Polignac number, because 66489087 - 2¹⁶ = 66423551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66489097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11637 + ... + 16382.

It is an arithmetic number, because the mean of its divisors is an integer number (6388560).

Almost surely, 2^66489087 is an apocalyptic number.

66489087 is a deficient number, since it is larger than the sum of its proper divisors (35727873).

66489087 is a wasteful number, since it uses less digits than its factorization.

66489087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28142.

The product of its (nonzero) digits is 580608, while the sum is 48.

The square root of 66489087 is about 8154.0840687351. The cubic root of 66489087 is about 405.1197877643.

The spelling of 66489087 in words is "sixty-six million, four hundred eighty-nine thousand, eighty-seven".