65411920 has 80 divisors (see below), whose sum is σ = 184059648. Its totient is φ = 21104640.

The previous prime is 65411917. The next prime is 65411939. The reversal of 65411920 is 2911456.

65411920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (28).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 6085 + ... + 12955.

Almost surely, 2^65411920 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 65411920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92029824).

65411920 is an abundant number, since it is smaller than the sum of its proper divisors (118647728).

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

65411920 is a wasteful number, since it uses less digits than its factorization.

65411920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6908 (or 6902 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 65411920 is about 8087.7635969408. The cubic root of 65411920 is about 402.9201302228.

The spelling of 65411920 in words is "sixty-five million, four hundred eleven thousand, nine hundred twenty".