166420423151363 has 2 divisors, whose sum is σ = 166420423151364. Its totient is φ = 166420423151362.

The previous prime is 166420423151179. The next prime is 166420423151399. The reversal of 166420423151363 is 363151324024661.

It is a happy number.

166420423151363 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (363151324024661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166420423151363 - 2⁸ = 166420423151107 is a prime.

It is not a weakly prime, because it can be changed into another prime (166420423151863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83210211575681 + 83210211575682.

It is an arithmetic number, because the mean of its divisors is an integer number (83210211575682).

Almost surely, 2^{166420423151363} is an apocalyptic number.

166420423151363 is a deficient number, since it is larger than the sum of its proper divisors (1).

166420423151363 is an equidigital number, since it uses as much as digits as its factorization.

166420423151363 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1866240, while the sum is 47.

The spelling of 166420423151363 in words is "one hundred sixty-six trillion, four hundred twenty billion, four hundred twenty-three million, one hundred fifty-one thousand, three hundred sixty-three".