65616404 has 24 divisors (see below), whose sum is σ = 131459328. Its totient is φ = 28072800.

The previous prime is 65616403. The next prime is 65616427. The reversal of 65616404 is 40461656.

65616404 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65616403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17957 + ... + 21299.

It is an arithmetic number, because the mean of its divisors is an integer number (5477472).

Almost surely, 2^65616404 is an apocalyptic number.

It is an amenable number.

65616404 is an abundant number, since it is smaller than the sum of its proper divisors (65842924).

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

65616404 is a wasteful number, since it uses less digits than its factorization.

65616404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4055 (or 4053 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 65616404 is about 8100.3952989962. The cubic root of 65616404 is about 403.3395492671.

The spelling of 65616404 in words is "sixty-five million, six hundred sixteen thousand, four hundred four".