661614416166 has 32 divisors (see below), whose sum is σ = 1445667366528. Its totient is φ = 200191299840.

The previous prime is 661614416131. The next prime is 661614416167.

661614416166 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 (661614416167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7403176 + ... + 7492011.

It is an arithmetic number, because the mean of its divisors is an integer number (45177105204).

Almost surely, 2^661614416166 is an apocalyptic number.

661614416166 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

661614416166 is an abundant number, since it is smaller than the sum of its proper divisors (784052950362).

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

661614416166 is a wasteful number, since it uses less digits than its factorization.

661614416166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14895876.

The product of its digits is 746496, while the sum is 48.

The spelling of 661614416166 in words is "six hundred sixty-one billion, six hundred fourteen million, four hundred sixteen thousand, one hundred sixty-six".