16685363477 has 4 divisors (see below), whose sum is σ = 16686954240. Its totient is φ = 16683772716.

The previous prime is 16685363447. The next prime is 16685363503. The reversal of 16685363477 is 77436358661.

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: 77436358661 = 139483 ⋅555167.

It is a cyclic number.

It is not a de Polignac number, because 16685363477 - 2⁸ = 16685363221 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 (16685363407) 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, 779543 + ... + 800660.

It is an arithmetic number, because the mean of its divisors is an integer number (4171738560).

Almost surely, 2^16685363477 is an apocalyptic number.

It is an amenable number.

16685363477 is a deficient number, since it is larger than the sum of its proper divisors (1590763).

16685363477 is a wasteful number, since it uses less digits than its factorization.

16685363477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1590762.

The product of its digits is 15240960, while the sum is 56.

The spelling of 16685363477 in words is "sixteen billion, six hundred eighty-five million, three hundred sixty-three thousand, four hundred seventy-seven".