16777265 has 4 divisors (see below), whose sum is σ = 20132724. Its totient is φ = 13421808.

The previous prime is 16777259. The next prime is 16777289. The reversal of 16777265 is 56277761.

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 6012304 + 10764961 = 2452^2 + 3281^2 .

It is a cyclic number.

It is not a de Polignac number, because 16777265 - 2¹⁶ = 16711729 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1677722 + ... + 1677731.

It is an arithmetic number, because the mean of its divisors is an integer number (5033181).

Almost surely, 2^16777265 is an apocalyptic number.

It is an amenable number.

16777265 is a deficient number, since it is larger than the sum of its proper divisors (3355459).

16777265 is an equidigital number, since it uses as much as digits as its factorization.

16777265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3355458.

The product of its digits is 123480, while the sum is 41.

The square root of 16777265 is about 4096.0059814409. The cubic root of 16777265 is about 256.0002492266. Note that the first 3 decimals are identical.

The spelling of 16777265 in words is "sixteen million, seven hundred seventy-seven thousand, two hundred sixty-five".