13346857661 has 4 divisors (see below), whose sum is σ = 13347096000. Its totient is φ = 13346619324.

The previous prime is 13346857627. The next prime is 13346857697. The reversal of 13346857661 is 16675864331.

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: 16675864331 = 7 ⋅2382266333.

It is a cyclic number.

It is not a de Polignac number, because 13346857661 - 2¹⁰ = 13346856637 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 (13346857561) 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, 15740 + ... + 164138.

It is an arithmetic number, because the mean of its divisors is an integer number (3336774000).

Almost surely, 2^13346857661 is an apocalyptic number.

It is an amenable number.

13346857661 is a deficient number, since it is larger than the sum of its proper divisors (238339).

13346857661 is an equidigital number, since it uses as much as digits as its factorization.

13346857661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238338.

The product of its digits is 2177280, while the sum is 50.

The spelling of 13346857661 in words is "thirteen billion, three hundred forty-six million, eight hundred fifty-seven thousand, six hundred sixty-one".