16661053 has 8 divisors (see below), whose sum is σ = 16857720. Its totient is φ = 16465920.

The previous prime is 16660979. The next prime is 16661083. The reversal of 16661053 is 35016661.

It can be written as a sum of positive squares in 4 ways, for example, as 5189284 + 11471769 = 2278^2 + 3387^2 .

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 16661053 - 2¹³ = 16652861 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 (16661083) 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, 61803 + ... + 62071.

It is an arithmetic number, because the mean of its divisors is an integer number (2107215).

Almost surely, 2^16661053 is an apocalyptic number.

It is an amenable number.

16661053 is a deficient number, since it is larger than the sum of its proper divisors (196667).

16661053 is a wasteful number, since it uses less digits than its factorization.

16661053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 16661053 is about 4081.7953157894. The cubic root of 16661053 is about 255.4077955393.

The spelling of 16661053 in words is "sixteen million, six hundred sixty-one thousand, fifty-three".