65378378 has 16 divisors (see below), whose sum is σ = 105858816. Its totient is φ = 30103920.

The previous prime is 65378359. The next prime is 65378387. The reversal of 65378378 is 87387356.

65378378 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon 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 7 ways as a sum of consecutive naturals, for example, 9323 + ... + 14753.

It is an arithmetic number, because the mean of its divisors is an integer number (6616176).

Almost surely, 2^65378378 is an apocalyptic number.

65378378 is a deficient number, since it is larger than the sum of its proper divisors (40480438).

65378378 is a wasteful number, since it uses less digits than its factorization.

65378378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5909.

The product of its digits is 846720, while the sum is 47.

The square root of 65378378 is about 8085.6897046572. The cubic root of 65378378 is about 402.8512484976.

It can be divided in two parts, 65378 and 378, that added together give a palindrome (65756).

The spelling of 65378378 in words is "sixty-five million, three hundred seventy-eight thousand, three hundred seventy-eight".