16666536513 has 32 divisors (see below), whose sum is σ = 24504597504. Its totient is φ = 9991800000.

The previous prime is 16666536493. The next prime is 16666536533. The reversal of 16666536513 is 31563566661.

It is an interprime number because it is at equal distance from previous prime (16666536493) and next prime (16666536533).

It is not a de Polignac number, because 16666536513 - 2¹² = 16666532417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16666536533) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6101358 + ... + 6104088.

It is an arithmetic number, because the mean of its divisors is an integer number (765768672).

Almost surely, 2^16666536513 is an apocalyptic number.

It is an amenable number.

16666536513 is a deficient number, since it is larger than the sum of its proper divisors (7838060991).

16666536513 is a wasteful number, since it uses less digits than its factorization.

16666536513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4677.

The product of its digits is 1749600, while the sum is 48.

The spelling of 16666536513 in words is "sixteen billion, six hundred sixty-six million, five hundred thirty-six thousand, five hundred thirteen".