66346447053 has 16 divisors (see below), whose sum is σ = 89940771200. Its totient is φ = 43492006080.

The previous prime is 66346447049. The next prime is 66346447067. The reversal of 66346447053 is 35074464366.

It is not a de Polignac number, because 66346447053 - 2² = 66346447049 is a prime.

It is a Smith number, since the sum of its digits (48) 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 a junction number, because it is equal to n+sod(n) for n = 66346446993 and 66346447011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66346447003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 534768 + ... + 647046.

It is an arithmetic number, because the mean of its divisors is an integer number (5621298200).

Almost surely, 2^66346447053 is an apocalyptic number.

It is an amenable number.

66346447053 is a deficient number, since it is larger than the sum of its proper divisors (23594324147).

66346447053 is a wasteful number, since it uses less digits than its factorization.

66346447053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115572.

The product of its (nonzero) digits is 4354560, while the sum is 48.

The spelling of 66346447053 in words is "sixty-six billion, three hundred forty-six million, four hundred forty-seven thousand, fifty-three".