66884005 has 8 divisors (see below), whose sum is σ = 83028600. Its totient is φ = 51662016.

The previous prime is 66883991. The next prime is 66884021. The reversal of 66884005 is 50048866.

It can be written as a sum of positive squares in 4 ways, for example, as 16630084 + 50253921 = 4078^2 + 7089^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 66884005 - 2¹⁵ = 66851237 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 230490 + ... + 230779.

It is an arithmetic number, because the mean of its divisors is an integer number (10378575).

Almost surely, 2^66884005 is an apocalyptic number.

It is an amenable number.

66884005 is a deficient number, since it is larger than the sum of its proper divisors (16144595).

66884005 is a wasteful number, since it uses less digits than its factorization.

66884005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461303.

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 66884005 is about 8178.2641801302. The cubic root of 66884005 is about 405.9202869542.

The spelling of 66884005 in words is "sixty-six million, eight hundred eighty-four thousand, five".