65616500 has 48 divisors (see below), whose sum is σ = 150870720. Its totient is φ = 24861600.

The previous prime is 65616497. The next prime is 65616547. The reversal of 65616500 is 561656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6047 + ... + 12953.

It is an arithmetic number, because the mean of its divisors is an integer number (3143140).

Almost surely, 2^65616500 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 65616500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75435360).

65616500 is an abundant number, since it is smaller than the sum of its proper divisors (85254220).

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

65616500 is a wasteful number, since it uses less digits than its factorization.

65616500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6945 (or 6933 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 65616500 is about 8100.4012246308. The cubic root of 65616500 is about 403.3397459688.

The spelling of 65616500 in words is "sixty-five million, six hundred sixteen thousand, five hundred".