7889966699887 has 8 divisors (see below), whose sum is σ = 7991845036416. Its totient is φ = 7788609480792.

The previous prime is 7889966699869. The next prime is 7889966699891.

7889966699887 is nontrivially palindromic in base 10.

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 7889966699887 - 2¹⁹ = 7889966175599 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7889966699792 and 7889966699801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7889966699827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130248883 + ... + 130309444.

It is an arithmetic number, because the mean of its divisors is an integer number (998980629552).

Almost surely, 2^{7889966699887} is an apocalyptic number.

7889966699887 is a deficient number, since it is larger than the sum of its proper divisors (101878336529).

7889966699887 is a wasteful number, since it uses less digits than its factorization.

7889966699887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260558717.

The product of its digits is 284432891904, while the sum is 100.

The spelling of 7889966699887 in words is "seven trillion, eight hundred eighty-nine billion, nine hundred sixty-six million, six hundred ninety-nine thousand, eight hundred eighty-seven".