7779718065 has 64 divisors (see below), whose sum is σ = 14495293440. Its totient is φ = 3489488640.

The previous prime is 7779718043. The next prime is 7779718073. The reversal of 7779718065 is 5608179777.

It is not a de Polignac number, because 7779718065 - 2⁵ = 7779718033 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7779717996 and 7779718014.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1890360 + ... + 1894470.

It is an arithmetic number, because the mean of its divisors is an integer number (226488960).

Almost surely, 2^7779718065 is an apocalyptic number.

It is an amenable number.

7779718065 is a deficient number, since it is larger than the sum of its proper divisors (6715575375).

7779718065 is a wasteful number, since it uses less digits than its factorization.

7779718065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4462.

The product of its (nonzero) digits is 5186160, while the sum is 57.

The square root of 7779718065 is about 88202.7100774120. The cubic root of 7779718065 is about 1981.4720598295.

The spelling of 7779718065 in words is "seven billion, seven hundred seventy-nine million, seven hundred eighteen thousand, sixty-five".