8240666040061 has 16 divisors (see below), whose sum is σ = 10184442704128. Its totient is φ = 6493033094400.

The previous prime is 8240666040049. The next prime is 8240666040107. The reversal of 8240666040061 is 1600406660428.

It is a cyclic number.

It is not a de Polignac number, because 8240666040061 - 2¹⁹ = 8240665515773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8240666040001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187855185 + ... + 187899046.

It is an arithmetic number, because the mean of its divisors is an integer number (636527669008).

Almost surely, 2^{8240666040061} is an apocalyptic number.

It is an amenable number.

8240666040061 is a deficient number, since it is larger than the sum of its proper divisors (1943776664067).

8240666040061 is a wasteful number, since it uses less digits than its factorization.

8240666040061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375754492.

The product of its (nonzero) digits is 331776, while the sum is 43.

The spelling of 8240666040061 in words is "eight trillion, two hundred forty billion, six hundred sixty-six million, forty thousand, sixty-one".