65616912 has 80 divisors (see below), whose sum is σ = 189561280. Its totient is φ = 21731328.

The previous prime is 65616893. The next prime is 65616913. The reversal of 65616912 is 21961656.

65616912 is a `hidden beast` number, since 6 + 561 + 6 + 91 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (65616913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82983 + ... + 83769.

It is an arithmetic number, because the mean of its divisors is an integer number (2369516).

Almost surely, 2^65616912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65616912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94780640).

65616912 is an abundant number, since it is smaller than the sum of its proper divisors (123944368).

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

65616912 is a wasteful number, since it uses less digits than its factorization.

65616912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997 (or 985 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 65616912 is about 8100.4266554299. The cubic root of 65616912 is about 403.3405901448.

The spelling of 65616912 in words is "sixty-five million, six hundred sixteen thousand, nine hundred twelve".