66166161089 has 8 divisors (see below), whose sum is σ = 79598389440. Its totient is φ = 53728912656.

The previous prime is 66166161073. The next prime is 66166161121. The reversal of 66166161089 is 98016166166.

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 66166161089 - 2⁴ = 66166161073 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66166161289) 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, 248744834 + ... + 248745099.

It is an arithmetic number, because the mean of its divisors is an integer number (9949798680).

Almost surely, 2^66166161089 is an apocalyptic number.

It is an amenable number.

66166161089 is a deficient number, since it is larger than the sum of its proper divisors (13432228351).

66166161089 is a wasteful number, since it uses less digits than its factorization.

66166161089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497489959.

The product of its (nonzero) digits is 559872, while the sum is 50.

The spelling of 66166161089 in words is "sixty-six billion, one hundred sixty-six million, one hundred sixty-one thousand, eighty-nine".