66391316355001 has 4 divisors (see below), whose sum is σ = 72426890569104. Its totient is φ = 60355742140900.

The previous prime is 66391316354999. The next prime is 66391316355061. The reversal of 66391316355001 is 10055361319366.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66391316355001 - 2¹ = 66391316354999 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66391316355061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3017787107035 + ... + 3017787107056.

It is an arithmetic number, because the mean of its divisors is an integer number (18106722642276).

Almost surely, 2^{66391316355001} is an apocalyptic number.

It is an amenable number.

66391316355001 is a deficient number, since it is larger than the sum of its proper divisors (6035574214103).

66391316355001 is a wasteful number, since it uses less digits than its factorization.

66391316355001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6035574214102.

The product of its (nonzero) digits is 1312200, while the sum is 49.

The spelling of 66391316355001 in words is "sixty-six trillion, three hundred ninety-one billion, three hundred sixteen million, three hundred fifty-five thousand, one".