845126661 has 16 divisors (see below), whose sum is σ = 1203686784. Its totient is φ = 525579264.

The previous prime is 845126641. The next prime is 845126663. The reversal of 845126661 is 166621548.

It is a happy number.

845126661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 845126661 - 2⁵ = 845126629 is a prime.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 67561 + ... + 79086.

It is an arithmetic number, because the mean of its divisors is an integer number (75230424).

Almost surely, 2^845126661 is an apocalyptic number.

It is an amenable number.

845126661 is a deficient number, since it is larger than the sum of its proper divisors (358560123).

845126661 is a wasteful number, since it uses less digits than its factorization.

845126661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146780.

The product of its digits is 69120, while the sum is 39.

The square root of 845126661 is about 29071.0622612934. The cubic root of 845126661 is about 945.4544294062.

The spelling of 845126661 in words is "eight hundred forty-five million, one hundred twenty-six thousand, six hundred sixty-one".