8203678661 has 8 divisors (see below), whose sum is σ = 8690459544. Its totient is φ = 7717365760.

The previous prime is 8203678649. The next prime is 8203678673. The reversal of 8203678661 is 1668763028.

It is an interprime number because it is at equal distance from previous prime (8203678649) and next prime (8203678673).

It can be written as a sum of positive squares in 4 ways, for example, as 72148036 + 8131530625 = 8494^2 + 90175^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8203678661 - 2⁶ = 8203678597 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 (8203678261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80570 + ... + 151323.

It is an arithmetic number, because the mean of its divisors is an integer number (1086307443).

Almost surely, 2^8203678661 is an apocalyptic number.

It is an amenable number.

8203678661 is a deficient number, since it is larger than the sum of its proper divisors (486780883).

8203678661 is a wasteful number, since it uses less digits than its factorization.

8203678661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233991.

The product of its (nonzero) digits is 580608, while the sum is 47.

The square root of 8203678661 is about 90574.1611112132. The cubic root of 8203678661 is about 2016.8311800981.

The spelling of 8203678661 in words is "eight billion, two hundred three million, six hundred seventy-eight thousand, six hundred sixty-one".