66443434466 has 4 divisors (see below), whose sum is σ = 99665151702. Its totient is φ = 33221717232.

The previous prime is 66443434441. The next prime is 66443434469.

66443434466 is nontrivially palindromic in base 10.

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., 65502724225 + 940710241 = 255935^2 + 30671^2 .

It is not an unprimeable number, because it can be changed into a prime (66443434469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16610858615 + ... + 16610858618.

Almost surely, 2^66443434466 is an apocalyptic number.

66443434466 is a deficient number, since it is larger than the sum of its proper divisors (33221717236).

66443434466 is a wasteful number, since it uses less digits than its factorization.

66443434466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33221717235.

The product of its digits is 11943936, while the sum is 50.

The spelling of 66443434466 in words is "sixty-six billion, four hundred forty-three million, four hundred thirty-four thousand, four hundred sixty-six".