66090145 has 16 divisors (see below), whose sum is σ = 87940800. Its totient is φ = 47275200.

The previous prime is 66090139. The next prime is 66090149. The reversal of 66090145 is 54109066.

66090145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66090145 - 2¹¹ = 66088097 is a prime.

It is a super-2 number, since 2×66090145² = 8735814532242050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66090149) 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 15 ways as a sum of consecutive naturals, for example, 6495 + ... + 13204.

It is an arithmetic number, because the mean of its divisors is an integer number (5496300).

Almost surely, 2^66090145 is an apocalyptic number.

It is an amenable number.

66090145 is a deficient number, since it is larger than the sum of its proper divisors (21850655).

66090145 is a wasteful number, since it uses less digits than its factorization.

66090145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19776.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 66090145 is about 8129.5845527308. The cubic root of 66090145 is about 404.3079070374.

The spelling of 66090145 in words is "sixty-six million, ninety thousand, one hundred forty-five".