66526 has 16 divisors (see below), whose sum is σ = 109440. Its totient is φ = 30240.

The previous prime is 66523. The next prime is 66529. The reversal of 66526 is 62566.

It is an interprime number because it is at equal distance from previous prime (66523) and next prime (66529).

It is a plaindrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 66526.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66523) 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, 1780 + ... + 1816.

It is an arithmetic number, because the mean of its divisors is an integer number (6840).

2⁶⁶⁵²⁶ is an apocalyptic number.

66526 is a deficient number, since it is larger than the sum of its proper divisors (42914).

66526 is a wasteful number, since it uses less digits than its factorization.

66526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99.

The product of its digits is 2160, while the sum is 25.

The square root of 66526 is about 257.9263460758. The cubic root of 66526 is about 40.5194744527.

Adding to 66526 its product of digits (2160), we get a palindrome (68686).

It can be divided in two parts, 66 and 526, that multiplied together give a triangular number (34716 = T₂₆₃).

The spelling of 66526 in words is "sixty-six thousand, five hundred twenty-six".