66011445 has 24 divisors (see below), whose sum is σ = 114636600. Its totient is φ = 35139456.

The previous prime is 66011443. The next prime is 66011467. The reversal of 66011445 is 54411066.

66011445 is a `hidden beast` number, since 6 + 601 + 14 + 45 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 352836 + 65658609 = 594^2 + 8103^2 .

It is not a de Polignac number, because 66011445 - 2¹ = 66011443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66011443) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30871 + ... + 32939.

It is an arithmetic number, because the mean of its divisors is an integer number (4776525).

Almost surely, 2^66011445 is an apocalyptic number.

It is an amenable number.

66011445 is a deficient number, since it is larger than the sum of its proper divisors (48625155).

66011445 is a wasteful number, since it uses less digits than its factorization.

66011445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2789 (or 2786 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 66011445 is about 8124.7427651588. The cubic root of 66011445 is about 404.1473603040.

The spelling of 66011445 in words is "sixty-six million, eleven thousand, four hundred forty-five".