16701661567021 has 8 divisors (see below), whose sum is σ = 17685168505920. Its totient is φ = 15718271990208.

The previous prime is 16701661567009. The next prime is 16701661567111. The reversal of 16701661567021 is 12076516610761.

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 16701661567021 - 2²⁷ = 16701527349293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16701661567121) 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, 29047441 + ... + 29616838.

It is an arithmetic number, because the mean of its divisors is an integer number (2210646063240).

Almost surely, 2^{16701661567021} is an apocalyptic number.

It is an amenable number.

16701661567021 is a deficient number, since it is larger than the sum of its proper divisors (983506938899).

16701661567021 is a wasteful number, since it uses less digits than its factorization.

16701661567021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58681043.

The product of its (nonzero) digits is 635040, while the sum is 49.

The spelling of 16701661567021 in words is "sixteen trillion, seven hundred one billion, six hundred sixty-one million, five hundred sixty-seven thousand, twenty-one".