66408880466 has 8 divisors (see below), whose sum is σ = 99614452860. Its totient is φ = 33204062848.

The previous prime is 66408880457. The next prime is 66408880493.

It is a happy number.

66408880466 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 63464190241 + 2944690225 = 251921^2 + 54265^2 .

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 (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160550 + ... + 398238.

Almost surely, 2^66408880466 is an apocalyptic number.

66408880466 is a deficient number, since it is larger than the sum of its proper divisors (33205572394).

66408880466 is a wasteful number, since it uses less digits than its factorization.

66408880466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377388.

The product of its (nonzero) digits is 10616832, while the sum is 56.

The spelling of 66408880466 in words is "sixty-six billion, four hundred eight million, eight hundred eighty thousand, four hundred sixty-six".