166610005165604 has 96 divisors (see below), whose sum is σ = 391517955204096. Its totient is φ = 59913146724480.

The previous prime is 166610005165589. The next prime is 166610005165613. The reversal of 166610005165604 is 406561500016661.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34520087 + ... + 39049409.

It is an arithmetic number, because the mean of its divisors is an integer number (4078312033376).

Almost surely, 2^{166610005165604} is an apocalyptic number.

166610005165604 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166610005165604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195758977602048).

166610005165604 is an abundant number, since it is smaller than the sum of its proper divisors (224907950038492).

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

166610005165604 is a wasteful number, since it uses less digits than its factorization.

166610005165604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4538545 (or 4538543 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 47.

The spelling of 166610005165604 in words is "one hundred sixty-six trillion, six hundred ten billion, five million, one hundred sixty-five thousand, six hundred four".