66317580484 has 9 divisors (see below), whose sum is σ = 116056667181. Its totient is φ = 33158532720.

The previous prime is 66317580467. The next prime is 66317580493. The reversal of 66317580484 is 48408571366.

The square root of 66317580484 is 257522.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 62211334084 + 4106246400 = 249422^2 + 64080^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 450664 + ... + 579424.

Almost surely, 2^66317580484 is an apocalyptic number.

66317580484 is the 257522-nd square number.

It is an amenable number.

66317580484 is a deficient number, since it is larger than the sum of its proper divisors (49739086697).

66317580484 is an frugal number, since it uses more digits than its factorization.

66317580484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257526 (or 128763 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 52.

The spelling of 66317580484 in words is "sixty-six billion, three hundred seventeen million, five hundred eighty thousand, four hundred eighty-four".