266780797625 has 8 divisors (see below), whose sum is σ = 332942435592. Its totient is φ = 213424638000.

The previous prime is 266780797537. The next prime is 266780797627. The reversal of 266780797625 is 526797087662.

It can be written as a sum of positive squares in 4 ways, for example, as 12627691129 + 254153106496 = 112373^2 + 504136^2 .

It is not a de Polignac number, because 266780797625 - 2¹⁶ = 266780732089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266780797627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1067123066 + ... + 1067123315.

It is an arithmetic number, because the mean of its divisors is an integer number (41617804449).

Almost surely, 2^266780797625 is an apocalyptic number.

266780797625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

266780797625 is a deficient number, since it is larger than the sum of its proper divisors (66161637967).

266780797625 is an equidigital number, since it uses as much as digits as its factorization.

266780797625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2134246396 (or 2134246386 counting only the distinct ones).

The product of its (nonzero) digits is 106686720, while the sum is 65.

The spelling of 266780797625 in words is "two hundred sixty-six billion, seven hundred eighty million, seven hundred ninety-seven thousand, six hundred twenty-five".