66393366497 has 8 divisors (see below), whose sum is σ = 67974745344. Its totient is φ = 64813685328.

The previous prime is 66393366491. The next prime is 66393366517. The reversal of 66393366497 is 79466339366.

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 66393366497 - 2¹² = 66393362401 is a prime.

It is a super-2 number, since 2×66393366497² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66393366491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345098 + ... + 501875.

It is an arithmetic number, because the mean of its divisors is an integer number (8496843168).

Almost surely, 2^66393366497 is an apocalyptic number.

It is an amenable number.

66393366497 is a deficient number, since it is larger than the sum of its proper divisors (1581378847).

66393366497 is a wasteful number, since it uses less digits than its factorization.

66393366497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848839.

The product of its digits is 79361856, while the sum is 62.

The spelling of 66393366497 in words is "sixty-six billion, three hundred ninety-three million, three hundred sixty-six thousand, four hundred ninety-seven".