65626320 has 80 divisors (see below), whose sum is σ = 205611840. Its totient is φ = 17313792.

The previous prime is 65626313. The next prime is 65626321. The reversal of 65626320 is 2362656.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65626321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21871 + ... + 24689.

It is an arithmetic number, because the mean of its divisors is an integer number (2570148).

Almost surely, 2^65626320 is an apocalyptic number.

65626320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65626320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102805920).

65626320 is an abundant number, since it is smaller than the sum of its proper divisors (139985520).

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

65626320 is a wasteful number, since it uses less digits than its factorization.

65626320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2932 (or 2926 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 65626320 is about 8101.0073447689. The cubic root of 65626320 is about 403.3598659017.

Adding to 65626320 its reverse (2362656), we get a palindrome (67988976).

The spelling of 65626320 in words is "sixty-five million, six hundred twenty-six thousand, three hundred twenty".