6775426791225 has 27 divisors (see below), whose sum is σ = 12135612141679. Its totient is φ = 3613540131600.

The previous prime is 6775426791187. The next prime is 6775426791281. The reversal of 6775426791225 is 5221976245776.

It is a happy number.

The square root of 6775426791225 is 2602965.

It is a perfect power (a square), and thus also a powerful number.

6775426791225 is a `hidden beast` number, since 6 + 7 + 7 + 542 + 6 + 79 + 12 + 2 + 5 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2439153644841 + 4336273146384 = 1561779^2 + 2082372^2 .

It is not a de Polignac number, because 6775426791225 - 2⁷ = 6775426791097 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 38957710 + ... + 39131240.

Almost surely, 2^{6775426791225} is an apocalyptic number.

6775426791225 is the 2602965-th square number.

6775426791225 is the 1301483-rd centered octagonal number.

It is an amenable number.

6775426791225 is a deficient number, since it is larger than the sum of its proper divisors (5360185350454).

6775426791225 is an frugal number, since it uses more digits than its factorization.

6775426791225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347078 (or 173539 counting only the distinct ones).

The product of its digits is 88905600, while the sum is 63.

The spelling of 6775426791225 in words is "six trillion, seven hundred seventy-five billion, four hundred twenty-six million, seven hundred ninety-one thousand, two hundred twenty-five".