66381359 has 8 divisors (see below), whose sum is σ = 73603920. Its totient is φ = 59356800.

The previous prime is 66381347. The next prime is 66381361. The reversal of 66381359 is 95318366.

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

It is a cyclic number.

It is not a de Polignac number, because 66381359 - 2²⁴ = 49604143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66381559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48794 + ... + 50135.

It is an arithmetic number, because the mean of its divisors is an integer number (9200490).

Almost surely, 2^66381359 is an apocalyptic number.

66381359 is a deficient number, since it is larger than the sum of its proper divisors (7222561).

66381359 is a wasteful number, since it uses less digits than its factorization.

66381359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99001.

The product of its digits is 116640, while the sum is 41.

The square root of 66381359 is about 8147.4756213198. The cubic root of 66381359 is about 404.9008729608.

It can be divided in two parts, 6638 and 1359, that added together give a palindrome (7997).

The spelling of 66381359 in words is "sixty-six million, three hundred eighty-one thousand, three hundred fifty-nine".