766172065 has 16 divisors (see below), whose sum is σ = 996133248. Its totient is φ = 563463936.

The previous prime is 766172063. The next prime is 766172101. The reversal of 766172065 is 560271667.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 766172065 - 2¹ = 766172063 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (766172063) 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 15 ways as a sum of consecutive naturals, for example, 101157 + ... + 108466.

It is an arithmetic number, because the mean of its divisors is an integer number (62258328).

Almost surely, 2^766172065 is an apocalyptic number.

It is an amenable number.

766172065 is a deficient number, since it is larger than the sum of its proper divisors (229961183).

766172065 is a wasteful number, since it uses less digits than its factorization.

766172065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209688.

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 766172065 is about 27679.8133122317. The cubic root of 766172065 is about 915.0442671209.

The spelling of 766172065 in words is "seven hundred sixty-six million, one hundred seventy-two thousand, sixty-five".