66366719 has 8 divisors (see below), whose sum is σ = 67763520. Its totient is φ = 64980000.

The previous prime is 66366683. The next prime is 66366731. The reversal of 66366719 is 91766366.

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 66366719 - 2¹² = 66362623 is a prime.

It is a super-2 number, since 2×66366719² = 8809082781649922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66366719.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66366749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11594 + ... + 16344.

It is an arithmetic number, because the mean of its divisors is an integer number (8470440).

Almost surely, 2^66366719 is an apocalyptic number.

66366719 is a deficient number, since it is larger than the sum of its proper divisors (1396801).

66366719 is a wasteful number, since it uses less digits than its factorization.

66366719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5041.

The product of its digits is 244944, while the sum is 44.

The square root of 66366719 is about 8146.5771339870. The cubic root of 66366719 is about 404.8711046408.

The spelling of 66366719 in words is "sixty-six million, three hundred sixty-six thousand, seven hundred nineteen".