65720322 has 48 divisors (see below), whose sum is σ = 152792640. Its totient is φ = 21146832.

The previous prime is 65720321. The next prime is 65720323. The reversal of 65720322 is 22302756.

65720322 is a `hidden beast` number, since 657 + 2 + 0 + 3 + 2 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (65720321) and next prime (65720323).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (65720321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11763 + ... + 16425.

It is an arithmetic number, because the mean of its divisors is an integer number (3183180).

Almost surely, 2^65720322 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65720322, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76396320).

65720322 is an abundant number, since it is smaller than the sum of its proper divisors (87072318).

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

65720322 is a wasteful number, since it uses less digits than its factorization.

65720322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4709 (or 4697 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 65720322 is about 8106.8071396821. The cubic root of 65720322 is about 403.5523625748.

The spelling of 65720322 in words is "sixty-five million, seven hundred twenty thousand, three hundred twenty-two".