19666429802067 has 8 divisors (see below), whose sum is σ = 27067774351360. Its totient is φ = 12688019227080.

The previous prime is 19666429802039. The next prime is 19666429802077. The reversal of 19666429802067 is 76020892466691.

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

It is not a de Polignac number, because 19666429802067 - 2¹¹ = 19666429800019 is a prime.

It is a super-2 number, since 2×19666429802067² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19666429801989 and 19666429802007.

It is not an unprimeable number, because it can be changed into a prime (19666429802077) 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, 105733493467 + ... + 105733493652.

It is an arithmetic number, because the mean of its divisors is an integer number (3383471793920).

Almost surely, 2^{19666429802067} is an apocalyptic number.

19666429802067 is a deficient number, since it is larger than the sum of its proper divisors (7401344549293).

19666429802067 is a wasteful number, since it uses less digits than its factorization.

19666429802067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211466987153.

The product of its (nonzero) digits is 94058496, while the sum is 66.

The spelling of 19666429802067 in words is "nineteen trillion, six hundred sixty-six billion, four hundred twenty-nine million, eight hundred two thousand, sixty-seven".