66132785 has 16 divisors (see below), whose sum is σ = 80669520. Its totient is φ = 52039680.

The previous prime is 66132779. The next prime is 66132791. The reversal of 66132785 is 58723166.

It is an interprime number because it is at equal distance from previous prime (66132779) and next prime (66132791).

It can be written as a sum of positive squares in 8 ways, for example, as 23726641 + 42406144 = 4871^2 + 6512^2 .

It is not a de Polignac number, because 66132785 - 2⁴ = 66132769 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156875 + ... + 157295.

It is an arithmetic number, because the mean of its divisors is an integer number (5041845).

Almost surely, 2^66132785 is an apocalyptic number.

It is an amenable number.

66132785 is a deficient number, since it is larger than the sum of its proper divisors (14536735).

66132785 is a wasteful number, since it uses less digits than its factorization.

66132785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868.

The product of its digits is 60480, while the sum is 38.

The square root of 66132785 is about 8132.2066501043. The cubic root of 66132785 is about 404.3948387220.

The spelling of 66132785 in words is "sixty-six million, one hundred thirty-two thousand, seven hundred eighty-five".