16685977 has 16 divisors (see below), whose sum is σ = 20966400. Its totient is φ = 12900240.

The previous prime is 16685969. The next prime is 16685983. The reversal of 16685977 is 77958661.

It is a cyclic number.

It is not a de Polignac number, because 16685977 - 2³ = 16685969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16685977.

It is not an unprimeable number, because it can be changed into a prime (16685917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9924 + ... + 11482.

It is an arithmetic number, because the mean of its divisors is an integer number (1310400).

Almost surely, 2^16685977 is an apocalyptic number.

It is an amenable number.

16685977 is a deficient number, since it is larger than the sum of its proper divisors (4280423).

16685977 is a wasteful number, since it uses less digits than its factorization.

16685977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1716.

The product of its digits is 635040, while the sum is 49.

The square root of 16685977 is about 4084.8472431659. The cubic root of 16685977 is about 255.5350906598.

The spelling of 16685977 in words is "sixteen million, six hundred eighty-five thousand, nine hundred seventy-seven".