766513344361 has 4 divisors (see below), whose sum is σ = 770526503424. Its totient is φ = 762500185300.

The previous prime is 766513344313. The next prime is 766513344371. The reversal of 766513344361 is 163443315667.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 766513344361 - 2²¹ = 766511247209 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (766513344371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2006579245 + ... + 2006579626.

It is an arithmetic number, because the mean of its divisors is an integer number (192631625856).

Almost surely, 2^766513344361 is an apocalyptic number.

It is an amenable number.

766513344361 is a deficient number, since it is larger than the sum of its proper divisors (4013159063).

766513344361 is a wasteful number, since it uses less digits than its factorization.

766513344361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4013159062.

The product of its digits is 3265920, while the sum is 49.

The spelling of 766513344361 in words is "seven hundred sixty-six billion, five hundred thirteen million, three hundred forty-four thousand, three hundred sixty-one".