16671405025707 has 4 divisors (see below), whose sum is σ = 22228540034280. Its totient is φ = 11114270017136.

The previous prime is 16671405025699. The next prime is 16671405025711. The reversal of 16671405025707 is 70752050417661.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 16671405025707 - 2³ = 16671405025699 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16671405025707.

It is not an unprimeable number, because it can be changed into a prime (16671405025727) 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, 2778567504282 + ... + 2778567504287.

It is an arithmetic number, because the mean of its divisors is an integer number (5557135008570).

Almost surely, 2^{16671405025707} is an apocalyptic number.

16671405025707 is a deficient number, since it is larger than the sum of its proper divisors (5557135008573).

16671405025707 is an equidigital number, since it uses as much as digits as its factorization.

16671405025707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5557135008572.

The product of its (nonzero) digits is 2469600, while the sum is 51.

The spelling of 16671405025707 in words is "sixteen trillion, six hundred seventy-one billion, four hundred five million, twenty-five thousand, seven hundred seven".