16697066693 has 8 divisors (see below), whose sum is σ = 16979892888. Its totient is φ = 16415702784.

The previous prime is 16697066657. The next prime is 16697066723. The reversal of 16697066693 is 39666079661.

It can be written as a sum of positive squares in 4 ways, for example, as 460445764 + 16236620929 = 21458^2 + 127423^2 .

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 16697066693 - 2¹⁴ = 16697050309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16697066623) 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, 342530 + ... + 388227.

It is an arithmetic number, because the mean of its divisors is an integer number (2122486611).

Almost surely, 2^16697066693 is an apocalyptic number.

It is an amenable number.

16697066693 is a deficient number, since it is larger than the sum of its proper divisors (282826195).

16697066693 is an equidigital number, since it uses as much as digits as its factorization.

16697066693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731143.

The product of its (nonzero) digits is 13226976, while the sum is 59.

The spelling of 16697066693 in words is "sixteen billion, six hundred ninety-seven million, sixty-six thousand, six hundred ninety-three".