6777489842 has 4 divisors (see below), whose sum is σ = 10166234766. Its totient is φ = 3388744920.

The previous prime is 6777489821. The next prime is 6777489847. The reversal of 6777489842 is 2489847776.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6755031721 + 22458121 = 82189^2 + 4739^2 .

It is not an unprimeable number, because it can be changed into a prime (6777489847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1694372459 + ... + 1694372462.

Almost surely, 2^6777489842 is an apocalyptic number.

6777489842 is a deficient number, since it is larger than the sum of its proper divisors (3388744924).

6777489842 is a wasteful number, since it uses less digits than its factorization.

6777489842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3388744923.

The product of its digits is 37933056, while the sum is 62.

The square root of 6777489842 is about 82325.5114894526. The cubic root of 6777489842 is about 1892.4436577188.

The spelling of 6777489842 in words is "six billion, seven hundred seventy-seven million, four hundred eighty-nine thousand, eight hundred forty-two".