66708041841 has 63 divisors (see below), whose sum is σ = 112864921273. Its totient is φ = 37967013000.

The previous prime is 66708041831. The next prime is 66708041857. The reversal of 66708041841 is 14814080766.

The square root of 66708041841 is 258279.

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

66708041841 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (63).

It is not a de Polignac number, because 66708041841 - 2¹³ = 66708033649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66708041831) by changing a digit.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 265768966 + ... + 265769216.

Almost surely, 2^66708041841 is an apocalyptic number.

66708041841 is the 258279-th square number.

66708041841 is the 129140-th centered octagonal number.

It is an amenable number.

66708041841 is a deficient number, since it is larger than the sum of its proper divisors (46156879432).

66708041841 is an frugal number, since it uses more digits than its factorization.

66708041841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550 (or 261 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The spelling of 66708041841 in words is "sixty-six billion, seven hundred eight million, forty-one thousand, eight hundred forty-one".