8171304661 has 4 divisors (see below), whose sum is σ = 8799866572. Its totient is φ = 7542742752.

The previous prime is 8171304653. The next prime is 8171304671. The reversal of 8171304661 is 1664031718.

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 866183761 + 7305120900 = 29431^2 + 85470^2 .

It is a cyclic number.

It is not a de Polignac number, because 8171304661 - 2³ = 8171304653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8171304661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8171304611) 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, 314280936 + ... + 314280961.

It is an arithmetic number, because the mean of its divisors is an integer number (2199966643).

Almost surely, 2^8171304661 is an apocalyptic number.

It is an amenable number.

8171304661 is a deficient number, since it is larger than the sum of its proper divisors (628561911).

8171304661 is a wasteful number, since it uses less digits than its factorization.

8171304661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628561910.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 8171304661 is about 90395.2690189039. The cubic root of 8171304661 is about 2014.1746901623.

The spelling of 8171304661 in words is "eight billion, one hundred seventy-one million, three hundred four thousand, six hundred sixty-one".