66447474466 has 8 divisors (see below), whose sum is σ = 99784348524. Its totient is φ = 33186024960.

The previous prime is 66447474463. The next prime is 66447474571.

66447474466 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 66277928025 + 169546441 = 257445^2 + 13021^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 66447474466.

It is not an unprimeable number, because it can be changed into a prime (66447474461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18853935 + ... + 18857458.

Almost surely, 2^66447474466 is an apocalyptic number.

66447474466 is a deficient number, since it is larger than the sum of its proper divisors (33336874058).

66447474466 is a wasteful number, since it uses less digits than its factorization.

66447474466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37712276.

The product of its digits is 65028096, while the sum is 58.

The spelling of 66447474466 in words is "sixty-six billion, four hundred forty-seven million, four hundred seventy-four thousand, four hundred sixty-six".