16842757661 has 4 divisors (see below), whose sum is σ = 16843027872. Its totient is φ = 16842487452.

The previous prime is 16842757649. The next prime is 16842757703. The reversal of 16842757661 is 16675724861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16675724861 = 227 ⋅73461343.

It is a cyclic number.

It is not a de Polignac number, because 16842757661 - 2⁶ = 16842757597 is a prime.

It is a super-3 number, since 3×16842757661³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16842757621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11216 + ... + 183878.

It is an arithmetic number, because the mean of its divisors is an integer number (4210756968).

Almost surely, 2^16842757661 is an apocalyptic number.

It is an amenable number.

16842757661 is a deficient number, since it is larger than the sum of its proper divisors (270211).

16842757661 is an equidigital number, since it uses as much as digits as its factorization.

16842757661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270210.

The product of its digits is 3386880, while the sum is 53.

The spelling of 16842757661 in words is "sixteen billion, eight hundred forty-two million, seven hundred fifty-seven thousand, six hundred sixty-one".