66869882 has 16 divisors (see below), whose sum is σ = 104119560. Its totient is φ = 32171328.

The previous prime is 66869879. The next prime is 66869917. The reversal of 66869882 is 28896866.

It can be written as a sum of positive squares in 4 ways, for example, as 21724921 + 45144961 = 4661^2 + 6719^2 .

It is a super-2 number, since 2×66869882² = 8943162237387848, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16568 + ... + 20204.

Almost surely, 2^66869882 is an apocalyptic number.

66869882 is a deficient number, since it is larger than the sum of its proper divisors (37249678).

66869882 is a wasteful number, since it uses less digits than its factorization.

66869882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3985.

The product of its digits is 1990656, while the sum is 53.

The square root of 66869882 is about 8177.4006872600. The cubic root of 66869882 is about 405.8917140252.

The spelling of 66869882 in words is "sixty-six million, eight hundred sixty-nine thousand, eight hundred eighty-two".