66102685 has 16 divisors (see below), whose sum is σ = 86910912. Its totient is φ = 47865600.

The previous prime is 66102679. The next prime is 66102689. The reversal of 66102685 is 58620166.

It is not a de Polignac number, because 66102685 - 2³ = 66102677 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66102685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66102689) 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, 10762 + ... + 15748.

It is an arithmetic number, because the mean of its divisors is an integer number (5431932).

Almost surely, 2^66102685 is an apocalyptic number.

It is an amenable number.

66102685 is a deficient number, since it is larger than the sum of its proper divisors (20808227).

66102685 is a wasteful number, since it uses less digits than its factorization.

66102685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5244.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 66102685 is about 8130.3557732734. The cubic root of 66102685 is about 404.3334766616. Note that the first 3 decimals are identical.

The spelling of 66102685 in words is "sixty-six million, one hundred two thousand, six hundred eighty-five".