766736308225 has 24 divisors (see below), whose sum is σ = 978042675320. Its totient is φ = 595836933120.

The previous prime is 766736308223. The next prime is 766736308237. The reversal of 766736308225 is 522803637667.

It can be written as a sum of positive squares in 12 ways, for example, as 520474230721 + 246262077504 = 721439^2 + 496248^2 .

It is not a de Polignac number, because 766736308225 - 2¹ = 766736308223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (766736308223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 109080 + ... + 1243129.

Almost surely, 2^766736308225 is an apocalyptic number.

It is an amenable number.

766736308225 is a deficient number, since it is larger than the sum of its proper divisors (211306367095).

766736308225 is a wasteful number, since it uses less digits than its factorization.

766736308225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1352869 (or 1352864 counting only the distinct ones).

The product of its (nonzero) digits is 15240960, while the sum is 55.

The spelling of 766736308225 in words is "seven hundred sixty-six billion, seven hundred thirty-six million, three hundred eight thousand, two hundred twenty-five".