845126665 has 4 divisors (see below), whose sum is σ = 1014152004. Its totient is φ = 676101328.

The previous prime is 845126663. The next prime is 845126699. The reversal of 845126665 is 566621548.

845126665 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 162715536 + 682411129 = 12756^2 + 26123^2 .

It is a cyclic number.

It is not a de Polignac number, because 845126665 - 2¹ = 845126663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (845126663) 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, 84512662 + ... + 84512671.

It is an arithmetic number, because the mean of its divisors is an integer number (253538001).

Almost surely, 2^845126665 is an apocalyptic number.

It is an amenable number.

845126665 is a deficient number, since it is larger than the sum of its proper divisors (169025339).

845126665 is a wasteful number, since it uses less digits than its factorization.

845126665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169025338.

The product of its digits is 345600, while the sum is 43.

The square root of 845126665 is about 29071.0623300904. The cubic root of 845126665 is about 945.4544308978.

The spelling of 845126665 in words is "eight hundred forty-five million, one hundred twenty-six thousand, six hundred sixty-five".