16644077 has 4 divisors (see below), whose sum is σ = 16926240. Its totient is φ = 16361916.

The previous prime is 16644059. The next prime is 16644083. The reversal of 16644077 is 77044661.

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 16644077 - 2⁶ = 16644013 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 (16644097) 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, 140993 + ... + 141110.

It is an arithmetic number, because the mean of its divisors is an integer number (4231560).

Almost surely, 2^16644077 is an apocalyptic number.

It is an amenable number.

16644077 is a deficient number, since it is larger than the sum of its proper divisors (282163).

16644077 is an equidigital number, since it uses as much as digits as its factorization.

16644077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282162.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 16644077 is about 4079.7153086950. The cubic root of 16644077 is about 255.3210207886.

The spelling of 16644077 in words is "sixteen million, six hundred forty-four thousand, seventy-seven".