66010018503 has 48 divisors (see below), whose sum is σ = 104300719488. Its totient is φ = 36887188800.

The previous prime is 66010018463. The next prime is 66010018523. The reversal of 66010018503 is 30581001066.

It is not a de Polignac number, because 66010018503 - 2¹² = 66010014407 is a prime.

It is a super-2 number, since 2×66010018503² (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 (66010018523) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4461508 + ... + 4476278.

It is an arithmetic number, because the mean of its divisors is an integer number (2172931656).

Almost surely, 2^66010018503 is an apocalyptic number.

66010018503 is a deficient number, since it is larger than the sum of its proper divisors (38290700985).

66010018503 is a wasteful number, since it uses less digits than its factorization.

66010018503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15756 (or 15745 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

Adding to 66010018503 its reverse (30581001066), we get a palindrome (96591019569).

The spelling of 66010018503 in words is "sixty-six billion, ten million, eighteen thousand, five hundred three".