66161551011683 has 8 divisors (see below), whose sum is σ = 70208278156800. Its totient is φ = 62212335364168.

The previous prime is 66161551011649. The next prime is 66161551011719. The reversal of 66161551011683 is 38611015516166.

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

It is a cyclic number.

It is not a de Polignac number, because 66161551011683 - 2¹⁶ = 66161550946147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66161551011583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24377873003 + ... + 24377875716.

It is an arithmetic number, because the mean of its divisors is an integer number (8776034769600).

Almost surely, 2^{66161551011683} is an apocalyptic number.

66161551011683 is a deficient number, since it is larger than the sum of its proper divisors (4046727145117).

66161551011683 is a wasteful number, since it uses less digits than its factorization.

66161551011683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48755748801.

The product of its (nonzero) digits is 777600, while the sum is 50.

The spelling of 66161551011683 in words is "sixty-six trillion, one hundred sixty-one billion, five hundred fifty-one million, eleven thousand, six hundred eighty-three".