6777506738 has 18 divisors (see below), whose sum is σ = 10631689887. Its totient is φ = 3240135580.

The previous prime is 6777506731. The next prime is 6777506779. The reversal of 6777506738 is 8376057776.

It can be written as a sum of positive squares in only one way, i.e., 3388753369 + 3388753369 = 58213^2 + 58213^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=58213.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6777506731) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2676533 + ... + 2679063.

Almost surely, 2^6777506738 is an apocalyptic number.

6777506738 is a deficient number, since it is larger than the sum of its proper divisors (3854183149).

6777506738 is an frugal number, since it uses more digits than its factorization.

6777506738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5110 (or 2556 counting only the distinct ones).

The product of its (nonzero) digits is 10372320, while the sum is 56.

The square root of 6777506738 is about 82325.6141064250. The cubic root of 6777506738 is about 1892.4452303119.

The spelling of 6777506738 in words is "six billion, seven hundred seventy-seven million, five hundred six thousand, seven hundred thirty-eight".