166965 has 8 divisors (see below), whose sum is σ = 267168. Its totient is φ = 89040.

The previous prime is 166949. The next prime is 166967. The reversal of 166965 is 569661.

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

It is not a de Polignac number, because 166965 - 2⁴ = 166949 is a prime.

It is a super-2 number, since 2×166965² = 55754622450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166967) 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, 5551 + ... + 5580.

It is an arithmetic number, because the mean of its divisors is an integer number (33396).

2¹⁶⁶⁹⁶⁵ is an apocalyptic number.

166965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166965 is a deficient number, since it is larger than the sum of its proper divisors (100203).

166965 is a wasteful number, since it uses less digits than its factorization.

166965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11139.

The product of its digits is 9720, while the sum is 33.

The square root of 166965 is about 408.6135093215. The cubic root of 166965 is about 55.0649370744.

It can be divided in two parts, 1 and 66965, that added together give a palindrome (66966).

The spelling of 166965 in words is "one hundred sixty-six thousand, nine hundred sixty-five".