66546446503 has 8 divisors (see below), whose sum is σ = 69464628576. Its totient is φ = 63630336000.

The previous prime is 66546446489. The next prime is 66546446509. The reversal of 66546446503 is 30564464566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66546446503 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 (66546446509) 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, 452058 + ... + 580903.

It is an arithmetic number, because the mean of its divisors is an integer number (8683078572).

Almost surely, 2^66546446503 is an apocalyptic number.

66546446503 is a deficient number, since it is larger than the sum of its proper divisors (2918182073).

66546446503 is a wasteful number, since it uses less digits than its factorization.

66546446503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1035785.

The product of its (nonzero) digits is 6220800, while the sum is 49.

The spelling of 66546446503 in words is "sixty-six billion, five hundred forty-six million, four hundred forty-six thousand, five hundred three".