166066505 has 8 divisors (see below), whose sum is σ = 217396224. Its totient is φ = 120775600.

The previous prime is 166066501. The next prime is 166066529. The reversal of 166066505 is 505660661.

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

It is not a de Polignac number, because 166066505 - 2² = 166066501 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166066501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1509641 + ... + 1509750.

It is an arithmetic number, because the mean of its divisors is an integer number (27174528).

Almost surely, 2^166066505 is an apocalyptic number.

It is an amenable number.

166066505 is a deficient number, since it is larger than the sum of its proper divisors (51329719).

166066505 is a wasteful number, since it uses less digits than its factorization.

166066505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3019407.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 166066505 is about 12886.6793628149. The cubic root of 166066505 is about 549.6598502825.

The spelling of 166066505 in words is "one hundred sixty-six million, sixty-six thousand, five hundred five".