16677987 has 16 divisors (see below), whose sum is σ = 23444640. Its totient is φ = 10529792.

The previous prime is 16677979. The next prime is 16678001. The reversal of 16677987 is 78977661.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 16677987 - 2³ = 16677979 is a prime.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (16677487) 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, 2803 + ... + 6419.

It is an arithmetic number, because the mean of its divisors is an integer number (1465290).

Almost surely, 2^16677987 is an apocalyptic number.

16677987 is a deficient number, since it is larger than the sum of its proper divisors (6766653).

16677987 is a wasteful number, since it uses less digits than its factorization.

16677987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3702.

The product of its digits is 889056, while the sum is 51.

The square root of 16677987 is about 4083.8691213113. The cubic root of 16677987 is about 255.4942968972.

The spelling of 16677987 in words is "sixteen million, six hundred seventy-seven thousand, nine hundred eighty-seven".