66110615999989 has 8 divisors (see below), whose sum is σ = 72989595760032. Its totient is φ = 59376456866640.

The previous prime is 66110615999929. The next prime is 66110616000007. The reversal of 66110615999989 is 98999951601166.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66110615999989 is a prime.

It is a super-2 number, since 2×66110615999989² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66110615999929) 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, 36205155714 + ... + 36205157539.

It is an arithmetic number, because the mean of its divisors is an integer number (9123699470004).

Almost surely, 2^{66110615999989} is an apocalyptic number.

It is an amenable number.

66110615999989 is a deficient number, since it is larger than the sum of its proper divisors (6878979760043).

66110615999989 is a wasteful number, since it uses less digits than its factorization.

66110615999989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72410313347.

The product of its (nonzero) digits is 510183360, while the sum is 79.

The spelling of 66110615999989 in words is "sixty-six trillion, one hundred ten billion, six hundred fifteen million, nine hundred ninety-nine thousand, nine hundred eighty-nine".