66881522 has 8 divisors (see below), whose sum is σ = 100357596. Its totient is φ = 33428992.

The previous prime is 66881489. The next prime is 66881531. The reversal of 66881522 is 22518866.

It can be written as a sum of positive squares in 2 ways, for example, as 66765241 + 116281 = 8171^2 + 341^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 6098 + ... + 13074.

Almost surely, 2^66881522 is an apocalyptic number.

66881522 is a deficient number, since it is larger than the sum of its proper divisors (33476074).

66881522 is a wasteful number, since it uses less digits than its factorization.

66881522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11772.

The product of its digits is 46080, while the sum is 38.

The square root of 66881522 is about 8178.1123738917. The cubic root of 66881522 is about 405.9152637674.

The spelling of 66881522 in words is "sixty-six million, eight hundred eighty-one thousand, five hundred twenty-two".