16655801 has 8 divisors (see below), whose sum is σ = 17736264. Its totient is φ = 15586560.

The previous prime is 16655797. The next prime is 16655803. The reversal of 16655801 is 10855661.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 42025 + 16613776 = 205^2 + 4076^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 16655801 - 2² = 16655797 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16655803) 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, 371 + ... + 5783.

It is an arithmetic number, because the mean of its divisors is an integer number (2217033).

Almost surely, 2^16655801 is an apocalyptic number.

It is an amenable number.

16655801 is a deficient number, since it is larger than the sum of its proper divisors (1080463).

16655801 is a wasteful number, since it uses less digits than its factorization.

16655801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5611.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 16655801 is about 4081.1519207204. The cubic root of 16655801 is about 255.3809556448.

The spelling of 16655801 in words is "sixteen million, six hundred fifty-five thousand, eight hundred one".