66303136503 has 24 divisors (see below), whose sum is σ = 97861585536. Its totient is φ = 43246803600.

The previous prime is 66303136499. The next prime is 66303136519. The reversal of 66303136503 is 30563130366.

66303136503 is a `hidden beast` number, since 6 + 630 + 3 + 13 + 6 + 5 + 0 + 3 = 666.

It is not a de Polignac number, because 66303136503 - 2² = 66303136499 is a prime.

It is a super-2 number, since 2×66303136503² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66303136553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 312325 + ... + 479742.

It is an arithmetic number, because the mean of its divisors is an integer number (4077566064).

Almost surely, 2^66303136503 is an apocalyptic number.

66303136503 is a deficient number, since it is larger than the sum of its proper divisors (31558449033).

66303136503 is a wasteful number, since it uses less digits than its factorization.

66303136503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792275 (or 792272 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 36.

Adding to 66303136503 its reverse (30563130366), we get a palindrome (96866266869).

The spelling of 66303136503 in words is "sixty-six billion, three hundred three million, one hundred thirty-six thousand, five hundred three".