16668670366667 has 4 divisors (see below), whose sum is σ = 18184004036376. Its totient is φ = 15153336696960.

The previous prime is 16668670366603. The next prime is 16668670366681. The reversal of 16668670366667 is 76666307686661.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 16668670366667 - 2⁶ = 16668670366603 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16668670366594 and 16668670366603.

It is not an unprimeable number, because it can be changed into a prime (16668670366567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 757666834838 + ... + 757666834859.

It is an arithmetic number, because the mean of its divisors is an integer number (4546001009094).

Almost surely, 2^{16668670366667} is an apocalyptic number.

16668670366667 is a deficient number, since it is larger than the sum of its proper divisors (1515333669709).

16668670366667 is a wasteful number, since it uses less digits than its factorization.

16668670366667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1515333669708.

The product of its (nonzero) digits is 1975228416, while the sum is 74.

The spelling of 16668670366667 in words is "sixteen trillion, six hundred sixty-eight billion, six hundred seventy million, three hundred sixty-six thousand, six hundred sixty-seven".