661133424331166 has 16 divisors (see below), whose sum is σ = 994225759458480. Its totient is φ = 329725001956800.

The previous prime is 661133424331129. The next prime is 661133424331181.

661133424331166 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32964701 + ... + 49080936.

It is an arithmetic number, because the mean of its divisors is an integer number (62139109966155).

Almost surely, 2^{661133424331166} is an apocalyptic number.

661133424331166 is a deficient number, since it is larger than the sum of its proper divisors (333092335127314).

661133424331166 is a wasteful number, since it uses less digits than its factorization.

661133424331166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82055899.

The product of its digits is 3359232, while the sum is 50.

The spelling of 661133424331166 in words is "six hundred sixty-one trillion, one hundred thirty-three billion, four hundred twenty-four million, three hundred thirty-one thousand, one hundred sixty-six".