66006516 has 12 divisors (see below), whose sum is σ = 154015232. Its totient is φ = 22002168.

The previous prime is 66006503. The next prime is 66006517. The reversal of 66006516 is 61560066.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66006517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2750260 + ... + 2750283.

Almost surely, 2^66006516 is an apocalyptic number.

It is an amenable number.

66006516 is an abundant number, since it is smaller than the sum of its proper divisors (88008716).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66006516 is a wasteful number, since it uses less digits than its factorization.

66006516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5500550 (or 5500548 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 66006516 is about 8124.4394268159. The cubic root of 66006516 is about 404.1373009781.

The spelling of 66006516 in words is "sixty-six million, six thousand, five hundred sixteen".