65861712 has 120 divisors (see below), whose sum is σ = 212319744. Its totient is φ = 18669312.

The previous prime is 65861707. The next prime is 65861713. The reversal of 65861712 is 21716856.

65861712 is a `hidden beast` number, since 6 + 586 + 1 + 71 + 2 = 666.

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

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65861713) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 224638 + ... + 224930.

Almost surely, 2^65861712 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 65861712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106159872).

65861712 is an abundant number, since it is smaller than the sum of its proper divisors (146458032).

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

65861712 is a wasteful number, since it uses less digits than its factorization.

65861712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537 (or 528 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 65861712 is about 8115.5229036705. The cubic root of 65861712 is about 403.8415547022.

The spelling of 65861712 in words is "sixty-five million, eight hundred sixty-one thousand, seven hundred twelve".