6660120879841 has 27 divisors (see below), whose sum is σ = 7927510623123. Its totient is φ = 5588602939920.

The previous prime is 6660120879829. The next prime is 6660120879887. The reversal of 6660120879841 is 1489780210666.

The square root of 6660120879841 is 2580721.

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., 985224982225 + 5674895897616 = 992585^2 + 2382204^2 .

It is not a de Polignac number, because 6660120879841 - 2²³ = 6660112491233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6660120879821) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 369034080 + ... + 369052126.

Almost surely, 2^{6660120879841} is an apocalyptic number.

6660120879841 is the 2580721-st square number.

6660120879841 is the 1290361-st centered octagonal number.

It is an amenable number.

6660120879841 is a deficient number, since it is larger than the sum of its proper divisors (1267389743282).

6660120879841 is an frugal number, since it uses more digits than its factorization.

6660120879841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36142 (or 18071 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 58.

The spelling of 6660120879841 in words is "six trillion, six hundred sixty billion, one hundred twenty million, eight hundred seventy-nine thousand, eight hundred forty-one".