65642200 has 48 divisors (see below), whose sum is σ = 164364480. Its totient is φ = 24236160.

The previous prime is 65642191. The next prime is 65642201. The reversal of 65642200 is 224656.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65642201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10024 + ... + 15223.

It is an arithmetic number, because the mean of its divisors is an integer number (3424260).

Almost surely, 2^65642200 is an apocalyptic number.

It is an amenable number.

65642200 is an abundant number, since it is smaller than the sum of its proper divisors (98722280).

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

65642200 is a wasteful number, since it uses less digits than its factorization.

65642200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25276 (or 25267 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 65642200 is about 8101.9874105061. The cubic root of 65642200 is about 403.3923977583.

Adding to 65642200 its reverse (224656), we get a palindrome (65866856).

The spelling of 65642200 in words is "sixty-five million, six hundred forty-two thousand, two hundred".