766473732173 has 4 divisors (see below), whose sum is σ = 770904216348. Its totient is φ = 762043248000.

The previous prime is 766473732169. The next prime is 766473732179. The reversal of 766473732173 is 371237374667.

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 539324265769 + 227149466404 = 734387^2 + 476602^2 .

It is a cyclic number.

It is not a de Polignac number, because 766473732173 - 2² = 766473732169 is a prime.

It is a super-2 number, since 2×766473732173² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (766473732179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2215241828 + ... + 2215242173.

It is an arithmetic number, because the mean of its divisors is an integer number (192726054087).

Almost surely, 2^766473732173 is an apocalyptic number.

It is an amenable number.

766473732173 is a deficient number, since it is larger than the sum of its proper divisors (4430484175).

766473732173 is a wasteful number, since it uses less digits than its factorization.

766473732173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4430484174.

The product of its digits is 18670176, while the sum is 56.

The spelling of 766473732173 in words is "seven hundred sixty-six billion, four hundred seventy-three million, seven hundred thirty-two thousand, one hundred seventy-three".