66481066 has 4 divisors (see below), whose sum is σ = 99721602. Its totient is φ = 33240532.

The previous prime is 66481061. The next prime is 66481069. The reversal of 66481066 is 66018466.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 61168041 + 5313025 = 7821^2 + 2305^2 .

It is not an unprimeable number, because it can be changed into a prime (66481061) 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, 16620265 + ... + 16620268.

Almost surely, 2^66481066 is an apocalyptic number.

66481066 is a deficient number, since it is larger than the sum of its proper divisors (33240536).

66481066 is a wasteful number, since it uses less digits than its factorization.

66481066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33240535.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 66481066 is about 8153.5922144782. The cubic root of 66481066 is about 405.1034963866.

The spelling of 66481066 in words is "sixty-six million, four hundred eighty-one thousand, sixty-six".