166214770505 has 8 divisors (see below), whose sum is σ = 227951685312. Its totient is φ = 113975842608.

The previous prime is 166214770493. The next prime is 166214770537. The reversal of 166214770505 is 505077412661.

166214770505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 166214770505 - 2⁴ = 166214770489 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 2374496687 + ... + 2374496756.

It is an arithmetic number, because the mean of its divisors is an integer number (28493960664).

Almost surely, 2^166214770505 is an apocalyptic number.

It is an amenable number.

166214770505 is a deficient number, since it is larger than the sum of its proper divisors (61736914807).

166214770505 is an equidigital number, since it uses as much as digits as its factorization.

166214770505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4748993455.

The product of its (nonzero) digits is 352800, while the sum is 44.

The spelling of 166214770505 in words is "one hundred sixty-six billion, two hundred fourteen million, seven hundred seventy thousand, five hundred five".