66162026166 has 64 divisors (see below), whose sum is σ = 136169510400. Its totient is φ = 21422880000.

The previous prime is 66162026149. The next prime is 66162026167.

It is a happy number.

66162026166 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66162026167) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21486615 + ... + 21489693.

It is an arithmetic number, because the mean of its divisors is an integer number (2127648600).

Almost surely, 2^66162026166 is an apocalyptic number.

66162026166 is an abundant number, since it is smaller than the sum of its proper divisors (70007484234).

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

66162026166 is a wasteful number, since it uses less digits than its factorization.

66162026166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3845.

The product of its (nonzero) digits is 186624, while the sum is 42.

It can be divided in two parts, 661620 and 26166, that added together give a palindrome (687786).

The spelling of 66162026166 in words is "sixty-six billion, one hundred sixty-two million, twenty-six thousand, one hundred sixty-six".