16776965 has 8 divisors (see below), whose sum is σ = 20171160. Its totient is φ = 13395712.

The previous prime is 16776961. The next prime is 16776967. The reversal of 16776965 is 56967761.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2390116 + 14386849 = 1546^2 + 3793^2 .

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 16776965 - 2² = 16776961 is a prime.

It is a super-2 number, since 2×16776965² = 562933109222450, which contains 22 as substring.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16776961) 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, 104 + ... + 5793.

It is an arithmetic number, because the mean of its divisors is an integer number (2521395).

Almost surely, 2^16776965 is an apocalyptic number.

It is an amenable number.

16776965 is a deficient number, since it is larger than the sum of its proper divisors (3394195).

16776965 is an equidigital number, since it uses as much as digits as its factorization.

16776965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6471.

The product of its digits is 476280, while the sum is 47.

The square root of 16776965 is about 4095.9693602370. The cubic root of 16776965 is about 255.9987233416.

The spelling of 16776965 in words is "sixteen million, seven hundred seventy-six thousand, nine hundred sixty-five".