766191803345 has 4 divisors (see below), whose sum is σ = 919430164020. Its totient is φ = 612953442672.

The previous prime is 766191803327. The next prime is 766191803347. The reversal of 766191803345 is 543308191667.

766191803345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 288656903824 + 477534899521 = 537268^2 + 691039^2 .

It is a cyclic number.

It is not a de Polignac number, because 766191803345 - 2⁶ = 766191803281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (766191803347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76619180330 + ... + 76619180339.

It is an arithmetic number, because the mean of its divisors is an integer number (229857541005).

Almost surely, 2^766191803345 is an apocalyptic number.

It is an amenable number.

766191803345 is a deficient number, since it is larger than the sum of its proper divisors (153238360675).

766191803345 is a wasteful number, since it uses less digits than its factorization.

766191803345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153238360674.

The product of its (nonzero) digits is 3265920, while the sum is 53.

The spelling of 766191803345 in words is "seven hundred sixty-six billion, one hundred ninety-one million, eight hundred three thousand, three hundred forty-five".