64381966 has 8 divisors (see below), whose sum is σ = 105352344. Its totient is φ = 29264520.

The previous prime is 64381957. The next prime is 64381969. The reversal of 64381966 is 66918346.

64381966 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64381969) 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 3 ways as a sum of consecutive naturals, for example, 1463205 + ... + 1463248.

It is an arithmetic number, because the mean of its divisors is an integer number (13169043).

Almost surely, 2^64381966 is an apocalyptic number.

64381966 is a deficient number, since it is larger than the sum of its proper divisors (40970378).

64381966 is a wasteful number, since it uses less digits than its factorization.

64381966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2926466.

The product of its digits is 186624, while the sum is 43.

The square root of 64381966 is about 8023.8373612630. The cubic root of 64381966 is about 400.7941846333.

The spelling of 64381966 in words is "sixty-four million, three hundred eighty-one thousand, nine hundred sixty-six".