166147363849 has 2 divisors, whose sum is σ = 166147363850. Its totient is φ = 166147363848.

The previous prime is 166147363817. The next prime is 166147363883. The reversal of 166147363849 is 948363741661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122897922624 + 43249441225 = 350568^2 + 207965^2 .

It is a cyclic number.

It is not a de Polignac number, because 166147363849 - 2⁵ = 166147363817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166147363793 and 166147363802.

It is not a weakly prime, because it can be changed into another prime (166147343849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83073681924 + 83073681925.

It is an arithmetic number, because the mean of its divisors is an integer number (83073681925).

Almost surely, 2^166147363849 is an apocalyptic number.

It is an amenable number.

166147363849 is a deficient number, since it is larger than the sum of its proper divisors (1).

166147363849 is an equidigital number, since it uses as much as digits as its factorization.

166147363849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15676416, while the sum is 58.

The spelling of 166147363849 in words is "one hundred sixty-six billion, one hundred forty-seven million, three hundred sixty-three thousand, eight hundred forty-nine".