66005516 has 12 divisors (see below), whose sum is σ = 118196232. Its totient is φ = 32235168.

The previous prime is 66005507. The next prime is 66005551. The reversal of 66005516 is 61550066.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191705 + ... + 192048.

It is an arithmetic number, because the mean of its divisors is an integer number (9849686).

Almost surely, 2^66005516 is an apocalyptic number.

It is an amenable number.

66005516 is a deficient number, since it is larger than the sum of its proper divisors (52190716).

66005516 is a wasteful number, since it uses less digits than its factorization.

66005516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383800 (or 383798 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 66005516 is about 8124.3778838752. The cubic root of 66005516 is about 404.1352600718.

The spelling of 66005516 in words is "sixty-six million, five thousand, five hundred sixteen".