847795661 has 6 divisors (see below), whose sum is σ = 900599850. Its totient is φ = 797925056.

The previous prime is 847795651. The next prime is 847795667. The reversal of 847795661 is 166597748.

It can be written as a sum of positive squares in 3 ways, for example, as 309091561 + 538704100 = 17581^2 + 23210^2 .

It is not a de Polignac number, because 847795661 - 2¹⁴ = 847779277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (847795667) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1466486 + ... + 1467063.

It is an arithmetic number, because the mean of its divisors is an integer number (150099975).

Almost surely, 2^847795661 is an apocalyptic number.

It is an amenable number.

847795661 is a deficient number, since it is larger than the sum of its proper divisors (52804189).

847795661 is a wasteful number, since it uses less digits than its factorization.

847795661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2933583 (or 2933566 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 53.

The square root of 847795661 is about 29116.9308307040. The cubic root of 847795661 is about 946.4486654309.

The spelling of 847795661 in words is "eight hundred forty-seven million, seven hundred ninety-five thousand, six hundred sixty-one".