66503131080885 has 48 divisors (see below), whose sum is σ = 119559710190960. Its totient is φ = 34168052275200.

The previous prime is 66503131080823. The next prime is 66503131080901. The reversal of 66503131080885 is 58808013130566.

It can be written as a sum of positive squares in 8 ways, for example, as 18906295370769 + 47596835710116 = 4348137^2 + 6899046^2 .

It is not a de Polignac number, because 66503131080885 - 2²⁴ = 66503114303669 is a prime.

It is a super-2 number, since 2×66503131080885² (a number of 28 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 197563620 + ... + 197899949.

It is an arithmetic number, because the mean of its divisors is an integer number (2490827295645).

Almost surely, 2^{66503131080885} is an apocalyptic number.

It is an amenable number.

66503131080885 is a deficient number, since it is larger than the sum of its proper divisors (53056579110075).

66503131080885 is a wasteful number, since it uses less digits than its factorization.

66503131080885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395463718 (or 395463715 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 54.

The spelling of 66503131080885 in words is "sixty-six trillion, five hundred three billion, one hundred thirty-one million, eighty thousand, eight hundred eighty-five".