16661296513 has 8 divisors (see below), whose sum is σ = 16719756768. Its totient is φ = 16602890304.

The previous prime is 16661296499. The next prime is 16661296523. The reversal of 16661296513 is 31569216661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16661296513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16661296523) 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, 662670 + ... + 687352.

It is an arithmetic number, because the mean of its divisors is an integer number (2089969596).

Almost surely, 2^16661296513 is an apocalyptic number.

It is an amenable number.

16661296513 is a deficient number, since it is larger than the sum of its proper divisors (58460255).

16661296513 is a wasteful number, since it uses less digits than its factorization.

16661296513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27023.

The product of its digits is 349920, while the sum is 46.

The spelling of 16661296513 in words is "sixteen billion, six hundred sixty-one million, two hundred ninety-six thousand, five hundred thirteen".