66027890 has 8 divisors (see below), whose sum is σ = 118850220. Its totient is φ = 26411152.

The previous prime is 66027883. The next prime is 66027901. The reversal of 66027890 is 9872066.

It can be written as a sum of positive squares in 2 ways, for example, as 54007801 + 12020089 = 7349^2 + 3467^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3301385 + ... + 3301404.

Almost surely, 2^66027890 is an apocalyptic number.

66027890 is a deficient number, since it is larger than the sum of its proper divisors (52822330).

66027890 is a wasteful number, since it uses less digits than its factorization.

66027890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6602796.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 66027890 is about 8125.7547341770. The cubic root of 66027890 is about 404.1809183813.

The spelling of 66027890 in words is "sixty-six million, twenty-seven thousand, eight hundred ninety".