66600216 has 48 divisors (see below), whose sum is σ = 180750960. Its totient is φ = 22153920.

The previous prime is 66600181. The next prime is 66600223. The reversal of 66600216 is 61200666.

It is a self number, because there is not a number n which added to its sum of digits gives 66600216.

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, 67261 + ... + 68243.

It is an arithmetic number, because the mean of its divisors is an integer number (3765645).

Almost surely, 2^66600216 is an apocalyptic number.

It is an amenable number.

66600216 is an abundant number, since it is smaller than the sum of its proper divisors (114150744).

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

66600216 is a wasteful number, since it uses less digits than its factorization.

66600216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1936 (or 1929 counting only the distinct ones).

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

The square root of 66600216 is about 8160.8955390937. The cubic root of 66600216 is about 405.3453661257.

The spelling of 66600216 in words is "sixty-six million, six hundred thousand, two hundred sixteen".