66207216 has 40 divisors (see below), whose sum is σ = 173453184. Its totient is φ = 21757120.

The previous prime is 66207209. The next prime is 66207223. The reversal of 66207216 is 61270266.

It is an interprime number because it is at equal distance from previous prime (66207209) and next prime (66207223).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6306 + ... + 13121.

Almost surely, 2^66207216 is an apocalyptic number.

It is an amenable number.

66207216 is an abundant number, since it is smaller than the sum of its proper divisors (107245968).

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

66207216 is a wasteful number, since it uses less digits than its factorization.

66207216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19509 (or 19503 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 66207216 is about 8136.7816733645. The cubic root of 66207216 is about 404.5464943503.

The spelling of 66207216 in words is "sixty-six million, two hundred seven thousand, two hundred sixteen".