2661178328073 has 40 divisors (see below), whose sum is σ = 4215113543520. Its totient is φ = 1668475869120.

The previous prime is 2661178328071. The next prime is 2661178328141. The reversal of 2661178328073 is 3708238711662.

It is a happy number.

2661178328073 is a `hidden beast` number, since 26 + 61 + 178 + 328 + 0 + 73 = 666.

It is not a de Polignac number, because 2661178328073 - 2¹ = 2661178328071 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2661178328071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6099963 + ... + 6521648.

It is an arithmetic number, because the mean of its divisors is an integer number (105377838588).

Almost surely, 2^{2661178328073} is an apocalyptic number.

It is an amenable number.

2661178328073 is a deficient number, since it is larger than the sum of its proper divisors (1553935215447).

2661178328073 is a wasteful number, since it uses less digits than its factorization.

2661178328073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12621779 (or 12621770 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The spelling of 2661178328073 in words is "two trillion, six hundred sixty-one billion, one hundred seventy-eight million, three hundred twenty-eight thousand, seventy-three".