16941661 has 4 divisors (see below), whose sum is σ = 18481824. Its totient is φ = 15401500.

The previous prime is 16941647. The next prime is 16941689. The reversal of 16941661 is 16614961.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 16941661 - 2⁹ = 16941149 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 (16941601) 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, 770065 + ... + 770086.

It is an arithmetic number, because the mean of its divisors is an integer number (4620456).

Almost surely, 2^16941661 is an apocalyptic number.

16941661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16941661 is a deficient number, since it is larger than the sum of its proper divisors (1540163).

16941661 is a wasteful number, since it uses less digits than its factorization.

16941661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1540162.

The product of its digits is 7776, while the sum is 34.

The square root of 16941661 is about 4116.0249027429. The cubic root of 16941661 is about 256.8336925624.

The spelling of 16941661 in words is "sixteen million, nine hundred forty-one thousand, six hundred sixty-one".