766508345 has 4 divisors (see below), whose sum is σ = 919810020. Its totient is φ = 613206672.

The previous prime is 766508339. The next prime is 766508363. The reversal of 766508345 is 543805667.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 543805667 = 61 ⋅8914847.

It can be written as a sum of positive squares in 2 ways, for example, as 95335696 + 671172649 = 9764^2 + 25907^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-766508345 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 766508296 and 766508305.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76650830 + ... + 76650839.

It is an arithmetic number, because the mean of its divisors is an integer number (229952505).

Almost surely, 2^766508345 is an apocalyptic number.

It is an amenable number.

766508345 is a deficient number, since it is larger than the sum of its proper divisors (153301675).

766508345 is a wasteful number, since it uses less digits than its factorization.

766508345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153301674.

The product of its (nonzero) digits is 604800, while the sum is 44.

The square root of 766508345 is about 27685.8871087780. The cubic root of 766508345 is about 915.1781213346.

The spelling of 766508345 in words is "seven hundred sixty-six million, five hundred eight thousand, three hundred forty-five".