65478798 has 144 divisors (see below), whose sum is σ = 191106864. Its totient is φ = 15966720.

The previous prime is 65478779. The next prime is 65478799. The reversal of 65478798 is 89787456.

65478798 is a `hidden beast` number, since 6 + 547 + 8 + 7 + 98 = 666.

65478798 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65478799) 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 71 ways as a sum of consecutive naturals, for example, 164736 + ... + 165132.

It is an arithmetic number, because the mean of its divisors is an integer number (1327131).

Almost surely, 2^65478798 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65478798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95553432).

65478798 is an abundant number, since it is smaller than the sum of its proper divisors (125628066).

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

65478798 is a wasteful number, since it uses less digits than its factorization.

65478798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447 (or 437 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 54.

The square root of 65478798 is about 8091.8970581687. The cubic root of 65478798 is about 403.0574003830.

The spelling of 65478798 in words is "sixty-five million, four hundred seventy-eight thousand, seven hundred ninety-eight".