65711216 has 20 divisors (see below), whose sum is σ = 131706600. Its totient is φ = 31722432.

The previous prime is 65711189. The next prime is 65711231. The reversal of 65711216 is 61211756.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

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, 70346 + ... + 71273.

It is an arithmetic number, because the mean of its divisors is an integer number (6585330).

Almost surely, 2^65711216 is an apocalyptic number.

It is an amenable number.

65711216 is an abundant number, since it is smaller than the sum of its proper divisors (65995384).

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

65711216 is a wasteful number, since it uses less digits than its factorization.

65711216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141656 (or 141650 counting only the distinct ones).

The product of its digits is 2520, while the sum is 29.

The square root of 65711216 is about 8106.2454934452. The cubic root of 65711216 is about 403.5337234008.

The spelling of 65711216 in words is "sixty-five million, seven hundred eleven thousand, two hundred sixteen".