65545920 has 168 divisors, whose sum is σ = 246065040. Its totient is φ = 15882240.

The previous prime is 65545901. The next prime is 65545927. The reversal of 65545920 is 2954556.

65545920 is a `hidden beast` number, since 65 + 5 + 4 + 592 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (65545927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30646 + ... + 32714.

Almost surely, 2^65545920 is an apocalyptic number.

65545920 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 65545920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123032520).

65545920 is an abundant number, since it is smaller than the sum of its proper divisors (180519120).

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

65545920 is a wasteful number, since it uses less digits than its factorization.

65545920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2103 (or 2090 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 65545920 is about 8096.0434781441. The cubic root of 65545920 is about 403.1950774153.

The spelling of 65545920 in words is "sixty-five million, five hundred forty-five thousand, nine hundred twenty".