166923792977 has 2 divisors, whose sum is σ = 166923792978. Its totient is φ = 166923792976.

The previous prime is 166923792929. The next prime is 166923792979. The reversal of 166923792977 is 779297329661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86897606656 + 80026186321 = 294784^2 + 282889^2 .

It is an emirp because it is prime and its reverse (779297329661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166923792977 - 2¹⁰ = 166923791953 is a prime.

Together with 166923792979, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (166923792979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83461896488 + 83461896489.

It is an arithmetic number, because the mean of its divisors is an integer number (83461896489).

Almost surely, 2^166923792977 is an apocalyptic number.

It is an amenable number.

166923792977 is a deficient number, since it is larger than the sum of its proper divisors (1).

166923792977 is an equidigital number, since it uses as much as digits as its factorization.

166923792977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108020304, while the sum is 68.

The spelling of 166923792977 in words is "one hundred sixty-six billion, nine hundred twenty-three million, seven hundred ninety-two thousand, nine hundred seventy-seven".