726116777 has 4 divisors (see below), whose sum is σ = 727056900. Its totient is φ = 725176656.

The previous prime is 726116753. The next prime is 726116779. The reversal of 726116777 is 777611627.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 777611627 = 13 ⋅59816279.

It can be written as a sum of positive squares in 2 ways, for example, as 51208336 + 674908441 = 7156^2 + 25979^2 .

It is a cyclic number.

It is not a de Polignac number, because 726116777 - 2¹⁶ = 726051241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (726116779) 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, 468902 + ... + 470447.

It is an arithmetic number, because the mean of its divisors is an integer number (181764225).

Almost surely, 2^726116777 is an apocalyptic number.

It is an amenable number.

726116777 is a deficient number, since it is larger than the sum of its proper divisors (940123).

726116777 is an equidigital number, since it uses as much as digits as its factorization.

726116777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940122.

The product of its digits is 172872, while the sum is 44.

The square root of 726116777 is about 26946.5540839641. The cubic root of 726116777 is about 898.8119207984.

The spelling of 726116777 in words is "seven hundred twenty-six million, one hundred sixteen thousand, seven hundred seventy-seven".