65720050 has 72 divisors (see below), whose sum is σ = 141165072. Its totient is φ = 22572000.

The previous prime is 65720027. The next prime is 65720059. The reversal of 65720050 is 5002756.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a junction number, because it is equal to n+sod(n) for n = 65719997 and 65720024.

It is not an unprimeable number, because it can be changed into a prime (65720059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 198385 + ... + 198715.

It is an arithmetic number, because the mean of its divisors is an integer number (1960626).

Almost surely, 2^65720050 is an apocalyptic number.

65720050 is an abundant number, since it is smaller than the sum of its proper divisors (75445022).

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

65720050 is a wasteful number, since it uses less digits than its factorization.

65720050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392 (or 368 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 65720050 is about 8106.7903636396. The cubic root of 65720050 is about 403.5518058399.

The spelling of 65720050 in words is "sixty-five million, seven hundred twenty thousand, fifty".