16406777 has 2 divisors, whose sum is σ = 16406778. Its totient is φ = 16406776.

The previous prime is 16406773. The next prime is 16406813. The reversal of 16406777 is 77760461.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10374841 + 6031936 = 3221^2 + 2456^2 .

It is a cyclic number.

It is not a de Polignac number, because 16406777 - 2² = 16406773 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16406777.

It is not a weakly prime, because it can be changed into another prime (16406773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8203388 + 8203389.

It is an arithmetic number, because the mean of its divisors is an integer number (8203389).

Almost surely, 2^16406777 is an apocalyptic number.

It is an amenable number.

16406777 is a deficient number, since it is larger than the sum of its proper divisors (1).

16406777 is an equidigital number, since it uses as much as digits as its factorization.

16406777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 49392, while the sum is 38.

The square root of 16406777 is about 4050.5279902748. The cubic root of 16406777 is about 254.1018098902.

The spelling of 16406777 in words is "sixteen million, four hundred six thousand, seven hundred seventy-seven".