1699816734666 has 20 divisors (see below), whose sum is σ = 3808848609522. Its totient is φ = 566605578168.

The previous prime is 1699816734653. The next prime is 1699816734667. The reversal of 1699816734666 is 6664376189961.

It can be written as a sum of positive squares in only one way, i.e., 1550958890625 + 148857844041 = 1245375^2 + 385821^2 .

It is a super-2 number, since 2×1699816734666² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1699816734594 and 1699816734603.

It is not an unprimeable number, because it can be changed into a prime (1699816734667) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 5246347785 + ... + 5246348108.

Almost surely, 2^{1699816734666} is an apocalyptic number.

1699816734666 is an abundant number, since it is smaller than the sum of its proper divisors (2109031874856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1699816734666 is a wasteful number, since it uses less digits than its factorization.

1699816734666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10492695907 (or 10492695898 counting only the distinct ones).

The product of its digits is 423263232, while the sum is 72.

The spelling of 1699816734666 in words is "one trillion, six hundred ninety-nine billion, eight hundred sixteen million, seven hundred thirty-four thousand, six hundred sixty-six".