66121505175742 has 8 divisors (see below), whose sum is σ = 99183619272600. Its totient is φ = 33060298751544.

The previous prime is 66121505175727. The next prime is 66121505175749. The reversal of 66121505175742 is 24757150512166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 66121505175742.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66121505175749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 226736017 + ... + 227027452.

It is an arithmetic number, because the mean of its divisors is an integer number (12397952409075).

Almost surely, 2^{66121505175742} is an apocalyptic number.

66121505175742 is a deficient number, since it is larger than the sum of its proper divisors (33062114096858).

66121505175742 is a wasteful number, since it uses less digits than its factorization.

66121505175742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453836330.

The product of its (nonzero) digits is 3528000, while the sum is 52.

The spelling of 66121505175742 in words is "sixty-six trillion, one hundred twenty-one billion, five hundred five million, one hundred seventy-five thousand, seven hundred forty-two".