6918065773 has 4 divisors (see below), whose sum is σ = 6979287708. Its totient is φ = 6856843840.

The previous prime is 6918065767. The next prime is 6918065789. The reversal of 6918065773 is 3775608196.

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 287709444 + 6630356329 = 16962^2 + 81427^2 .

It is a cyclic number.

It is not a de Polignac number, because 6918065773 - 2⁹ = 6918065261 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6918065773.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6918065753) 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, 30610798 + ... + 30611023.

It is an arithmetic number, because the mean of its divisors is an integer number (1744821927).

Almost surely, 2^6918065773 is an apocalyptic number.

It is an amenable number.

6918065773 is a deficient number, since it is larger than the sum of its proper divisors (61221935).

6918065773 is a wasteful number, since it uses less digits than its factorization.

6918065773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61221934.

The product of its (nonzero) digits is 1905120, while the sum is 52.

The square root of 6918065773 is about 83174.9107183170. The cubic root of 6918065773 is about 1905.4383224982.

The spelling of 6918065773 in words is "six billion, nine hundred eighteen million, sixty-five thousand, seven hundred seventy-three".