8103666561 has 8 divisors (see below), whose sum is σ = 10824289344. Its totient is φ = 5392744080.

The previous prime is 8103666559. The next prime is 8103666577. The reversal of 8103666561 is 1656663018.

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

It is not a de Polignac number, because 8103666561 - 2¹ = 8103666559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8103666541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2423125 + ... + 2426466.

It is an arithmetic number, because the mean of its divisors is an integer number (1353036168).

Almost surely, 2^8103666561 is an apocalyptic number.

It is an amenable number.

8103666561 is a deficient number, since it is larger than the sum of its proper divisors (2720622783).

8103666561 is a wasteful number, since it uses less digits than its factorization.

8103666561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4850151.

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 8103666561 is about 90020.3674786990. The cubic root of 8103666561 is about 2008.6018312940.

The spelling of 8103666561 in words is "eight billion, one hundred three million, six hundred sixty-six thousand, five hundred sixty-one".