66085503 has 16 divisors (see below), whose sum is σ = 96322176. Its totient is φ = 39969440.

The previous prime is 66085493. The next prime is 66085531. The reversal of 66085503 is 30558066.

It is a cyclic number.

It is not a de Polignac number, because 66085503 - 2⁵ = 66085471 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66085303) 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, 16801 + ... + 20357.

It is an arithmetic number, because the mean of its divisors is an integer number (6020136).

Almost surely, 2^66085503 is an apocalyptic number.

66085503 is a deficient number, since it is larger than the sum of its proper divisors (30236673).

66085503 is a wasteful number, since it uses less digits than its factorization.

66085503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4134.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 66085503 is about 8129.2990472734. The cubic root of 66085503 is about 404.2984409702.

The spelling of 66085503 in words is "sixty-six million, eighty-five thousand, five hundred three".