166420423151366 has 16 divisors (see below), whose sum is σ = 252225859761456. Its totient is φ = 82345284274176.

The previous prime is 166420423151363. The next prime is 166420423151399. The reversal of 166420423151366 is 663151324024661.

It is a happy number.

166420423151366 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166420423151363) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34667936 + ... + 39175331.

It is an arithmetic number, because the mean of its divisors is an integer number (15764116235091).

Almost surely, 2^{166420423151366} is an apocalyptic number.

166420423151366 is a deficient number, since it is larger than the sum of its proper divisors (85805436610090).

166420423151366 is a wasteful number, since it uses less digits than its factorization.

166420423151366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73854983.

The product of its (nonzero) digits is 3732480, while the sum is 50.

The spelling of 166420423151366 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-six".