616666667889 has 8 divisors (see below), whose sum is σ = 822280972320. Its totient is φ = 411081737696.

The previous prime is 616666667879. The next prime is 616666667921. The reversal of 616666667889 is 988766666616.

616666667889 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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 616666667889 - 2¹⁵ = 616666635121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 616666667889.

It is not an unprimeable number, because it can be changed into a prime (616666667879) 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, 7294527 + ... + 7378580.

It is an arithmetic number, because the mean of its divisors is an integer number (102785121540).

Almost surely, 2^616666667889 is an apocalyptic number.

It is an amenable number.

616666667889 is a deficient number, since it is larger than the sum of its proper divisors (205614304431).

616666667889 is a wasteful number, since it uses less digits than its factorization.

616666667889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14687119.

The product of its digits is 1128701952, while the sum is 75.

The spelling of 616666667889 in words is "six hundred sixteen billion, six hundred sixty-six million, six hundred sixty-seven thousand, eight hundred eighty-nine".