166020517 has 16 divisors (see below), whose sum is σ = 184250752. Its totient is φ = 148599360.

The previous prime is 166020493. The next prime is 166020527. The reversal of 166020517 is 715020661.

166020517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 166020517 - 2¹¹ = 166018469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166020527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 262792 + ... + 263422.

It is an arithmetic number, because the mean of its divisors is an integer number (11515672).

Almost surely, 2^166020517 is an apocalyptic number.

It is an amenable number.

166020517 is a deficient number, since it is larger than the sum of its proper divisors (18230235).

166020517 is a wasteful number, since it uses less digits than its factorization.

166020517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1228.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 166020517 is about 12884.8949161411. The cubic root of 166020517 is about 549.6091073770.

The spelling of 166020517 in words is "one hundred sixty-six million, twenty thousand, five hundred seventeen".