66216060 has 36 divisors (see below), whose sum is σ = 200855928. Its totient is φ = 17657568.

The previous prime is 66216053. The next prime is 66216097. The reversal of 66216060 is 6061266.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 183754 + ... + 184113.

Almost surely, 2^66216060 is an apocalyptic number.

66216060 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66216060 is an abundant number, since it is smaller than the sum of its proper divisors (134639868).

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

66216060 is a wasteful number, since it uses less digits than its factorization.

66216060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367882 (or 367877 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 66216060 is about 8137.3251133281. The cubic root of 66216060 is about 404.5645067368.

The spelling of 66216060 in words is "sixty-six million, two hundred sixteen thousand, sixty".