65711736 has 80 divisors (see below), whose sum is σ = 192099600. Its totient is φ = 20946816.

The previous prime is 65711731. The next prime is 65711743. The reversal of 65711736 is 63711756.

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

It is a self number, because there is not a number n which added to its sum of digits gives 65711736.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65711731) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12700 + ... + 17108.

It is an arithmetic number, because the mean of its divisors is an integer number (2401245).

Almost surely, 2^65711736 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 65711736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96049800).

65711736 is an abundant number, since it is smaller than the sum of its proper divisors (126387864).

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

65711736 is a wasteful number, since it uses less digits than its factorization.

65711736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4450 (or 4437 counting only the distinct ones).

The product of its digits is 26460, while the sum is 36.

The square root of 65711736 is about 8106.2775674165. The cubic root of 65711736 is about 403.5347878410.

The spelling of 65711736 in words is "sixty-five million, seven hundred eleven thousand, seven hundred thirty-six".