16634435066 has 4 divisors (see below), whose sum is σ = 24951652602. Its totient is φ = 8317217532.

The previous prime is 16634435047. The next prime is 16634435093. The reversal of 16634435066 is 66053443661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66053443661 = 353 ⋅187120237.

It can be written as a sum of positive squares in only one way, i.e., 16170937225 + 463497841 = 127165^2 + 21529^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4158608765 + ... + 4158608768.

Almost surely, 2^16634435066 is an apocalyptic number.

16634435066 is a deficient number, since it is larger than the sum of its proper divisors (8317217536).

16634435066 is an equidigital number, since it uses as much as digits as its factorization.

16634435066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8317217535.

The product of its (nonzero) digits is 933120, while the sum is 44.

The spelling of 16634435066 in words is "sixteen billion, six hundred thirty-four million, four hundred thirty-five thousand, sixty-six".