661132202231166 has 8 divisors (see below), whose sum is σ = 1322264404462344. Its totient is φ = 220377400743720.

The previous prime is 661132202231159. The next prime is 661132202231167.

661132202231166 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

661132202231166 is an admirable number.

It is a super-5 number, since 5×661132202231166⁵ (a number of 75 digits) contains 55555 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661132202231167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55094350185925 + ... + 55094350185936.

It is an arithmetic number, because the mean of its divisors is an integer number (165283050557793).

Almost surely, 2^{661132202231166} is an apocalyptic number.

661132202231166 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

661132202231166 is a wasteful number, since it uses less digits than its factorization.

661132202231166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110188700371866.

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

It can be divided in two parts, 66113220 and 2231166, that added together give a palindrome (68344386).

The spelling of 661132202231166 in words is "six hundred sixty-one trillion, one hundred thirty-two billion, two hundred two million, two hundred thirty-one thousand, one hundred sixty-six".