66887122 has 4 divisors (see below), whose sum is σ = 100330686. Its totient is φ = 33443560.

The previous prime is 66887101. The next prime is 66887123. The reversal of 66887122 is 22178866.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22178866 = 2 ⋅11089433.

It can be written as a sum of positive squares in only one way, i.e., 47623801 + 19263321 = 6901^2 + 4389^2 .

It is not an unprimeable number, because it can be changed into a prime (66887123) by changing a digit.

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 as a sum of consecutive naturals, namely, 16721779 + ... + 16721782.

Almost surely, 2^66887122 is an apocalyptic number.

66887122 is a deficient number, since it is larger than the sum of its proper divisors (33443564).

66887122 is a wasteful number, since it uses less digits than its factorization.

66887122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33443563.

The product of its digits is 64512, while the sum is 40.

The square root of 66887122 is about 8178.4547440210. The cubic root of 66887122 is about 405.9265925668.

The spelling of 66887122 in words is "sixty-six million, eight hundred eighty-seven thousand, one hundred twenty-two".