66393143 has 8 divisors (see below), whose sum is σ = 70438320. Its totient is φ = 62363520.

The previous prime is 66393097. The next prime is 66393167. The reversal of 66393143 is 34139366.

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 66393143 - 2¹⁰ = 66392119 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 (66393343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5588 + ... + 12806.

It is an arithmetic number, because the mean of its divisors is an integer number (8804790).

Almost surely, 2^66393143 is an apocalyptic number.

66393143 is a deficient number, since it is larger than the sum of its proper divisors (4045177).

66393143 is a wasteful number, since it uses less digits than its factorization.

66393143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7777.

The product of its digits is 34992, while the sum is 35.

The square root of 66393143 is about 8148.1987580078. The cubic root of 66393143 is about 404.9248308392.

The spelling of 66393143 in words is "sixty-six million, three hundred ninety-three thousand, one hundred forty-three".