66495 has 32 divisors (see below), whose sum is σ = 129024. Its totient is φ = 28800.

The previous prime is 66491. The next prime is 66499. The reversal of 66495 is 59466.

It is an interprime number because it is at equal distance from previous prime (66491) and next prime (66499).

It is not a de Polignac number, because 66495 - 2² = 66491 is a prime.

66495 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 66495.

It is not an unprimeable number, because it can be changed into a prime (66491) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2130 + ... + 2160.

It is an arithmetic number, because the mean of its divisors is an integer number (4032).

2⁶⁶⁴⁹⁵ is an apocalyptic number.

66495 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

66495 is a deficient number, since it is larger than the sum of its proper divisors (62529).

66495 is a wasteful number, since it uses less digits than its factorization.

66495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63.

The product of its digits is 6480, while the sum is 30.

The square root of 66495 is about 257.8662443981. The cubic root of 66495 is about 40.5131796764.

It can be divided in two parts, 66 and 495, that added together give a triangular number (561 = T₃₃).

The spelling of 66495 in words is "sixty-six thousand, four hundred ninety-five".