166441265532066 has 16 divisors (see below), whose sum is σ = 380437178359104. Its totient is φ = 47554647294864.

The previous prime is 166441265532011. The next prime is 166441265532067. The reversal of 166441265532066 is 660235562144661.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 166441265531997 and 166441265532015.

It is not an unprimeable number, because it can be changed into a prime (166441265532067) 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, 1981443637245 + ... + 1981443637328.

It is an arithmetic number, because the mean of its divisors is an integer number (23777323647444).

Almost surely, 2^{166441265532066} is an apocalyptic number.

166441265532066 is an abundant number, since it is smaller than the sum of its proper divisors (213995912827038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166441265532066 is a wasteful number, since it uses less digits than its factorization.

166441265532066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3962887274585.

The product of its (nonzero) digits is 37324800, while the sum is 57.

The spelling of 166441265532066 in words is "one hundred sixty-six trillion, four hundred forty-one billion, two hundred sixty-five million, five hundred thirty-two thousand, sixty-six".