66666733393 has 8 divisors (see below), whose sum is σ = 72311456000. Its totient is φ = 61095798288.

The previous prime is 66666733369. The next prime is 66666733411. The reversal of 66666733393 is 39333766666.

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 66666733393 - 2¹³ = 66666725201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66666733993) 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, 18444993 + ... + 18448606.

It is an arithmetic number, because the mean of its divisors is an integer number (9038932000).

Almost surely, 2^66666733393 is an apocalyptic number.

It is an amenable number.

66666733393 is a deficient number, since it is larger than the sum of its proper divisors (5644722607).

66666733393 is a wasteful number, since it uses less digits than its factorization.

66666733393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36893751.

The product of its digits is 39680928, while the sum is 58.

The spelling of 66666733393 in words is "sixty-six billion, six hundred sixty-six million, seven hundred thirty-three thousand, three hundred ninety-three".