16955661 has 4 divisors (see below), whose sum is σ = 22607552. Its totient is φ = 11303772.

The previous prime is 16955651. The next prime is 16955663. The reversal of 16955661 is 16655961.

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 not a de Polignac number, because 16955661 - 2⁹ = 16955149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16955663) 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, 2825941 + ... + 2825946.

It is an arithmetic number, because the mean of its divisors is an integer number (5651888).

Almost surely, 2^16955661 is an apocalyptic number.

It is an amenable number.

16955661 is a deficient number, since it is larger than the sum of its proper divisors (5651891).

16955661 is an equidigital number, since it uses as much as digits as its factorization.

16955661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5651890.

The product of its digits is 48600, while the sum is 39.

The square root of 16955661 is about 4117.7252215271. The cubic root of 16955661 is about 256.9044192305.

The spelling of 16955661 in words is "sixteen million, nine hundred fifty-five thousand, six hundred sixty-one".