166309837882 has 4 divisors (see below), whose sum is σ = 249464756826. Its totient is φ = 83154918940.

The previous prime is 166309837879. The next prime is 166309837933. The reversal of 166309837882 is 288738903661.

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., 118541801401 + 47768036481 = 344299^2 + 218559^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 166309837882.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41577459469 + ... + 41577459472.

Almost surely, 2^166309837882 is an apocalyptic number.

166309837882 is a deficient number, since it is larger than the sum of its proper divisors (83154918944).

166309837882 is an equidigital number, since it uses as much as digits as its factorization.

166309837882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83154918943.

The product of its (nonzero) digits is 20901888, while the sum is 61.

The spelling of 166309837882 in words is "one hundred sixty-six billion, three hundred nine million, eight hundred thirty-seven thousand, eight hundred eighty-two".