166161583 has 8 divisors (see below), whose sum is σ = 190961280. Its totient is φ = 141627480.

The previous prime is 166161577. The next prime is 166161599. The reversal of 166161583 is 385161661.

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

It is a cyclic number.

It is not a de Polignac number, because 166161583 - 2¹³ = 166153391 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 (166161533) 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, 65053 + ... + 67558.

It is an arithmetic number, because the mean of its divisors is an integer number (23870160).

Almost surely, 2^166161583 is an apocalyptic number.

166161583 is a deficient number, since it is larger than the sum of its proper divisors (24799697).

166161583 is a wasteful number, since it uses less digits than its factorization.

166161583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132797.

The product of its digits is 25920, while the sum is 37.

The square root of 166161583 is about 12890.3678380409. The cubic root of 166161583 is about 549.7647291257.

The spelling of 166161583 in words is "one hundred sixty-six million, one hundred sixty-one thousand, five hundred eighty-three".