16029661 has 4 divisors (see below), whose sum is σ = 16122492. Its totient is φ = 15936832.

The previous prime is 16029659. The next prime is 16029703. The reversal of 16029661 is 16692061.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13734436 + 2295225 = 3706^2 + 1515^2 .

It is a cyclic number.

It is not a de Polignac number, because 16029661 - 2¹ = 16029659 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 (16069661) 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, 46156 + ... + 46501.

It is an arithmetic number, because the mean of its divisors is an integer number (4030623).

Almost surely, 2^16029661 is an apocalyptic number.

It is an amenable number.

16029661 is a deficient number, since it is larger than the sum of its proper divisors (92831).

16029661 is an equidigital number, since it uses as much as digits as its factorization.

16029661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92830.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 16029661 is about 4003.7059082805. The cubic root of 16029661 is about 252.1398243513.

The spelling of 16029661 in words is "sixteen million, twenty-nine thousand, six hundred sixty-one".