8551665801 has 40 divisors (see below), whose sum is σ = 14817640640. Its totient is φ = 4813709472.

The previous prime is 8551665799. The next prime is 8551665803. The reversal of 8551665801 is 1085661558.

8551665801 is a `hidden beast` number, since 8 + 5 + 5 + 1 + 66 + 580 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (8551665799) and next prime (8551665803).

It is not a de Polignac number, because 8551665801 - 2¹ = 8551665799 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8551665803) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 74566 + ... + 150543.

It is an arithmetic number, because the mean of its divisors is an integer number (370441016).

Almost surely, 2^8551665801 is an apocalyptic number.

8551665801 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

8551665801 is a deficient number, since it is larger than the sum of its proper divisors (6265974839).

8551665801 is a wasteful number, since it uses less digits than its factorization.

8551665801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225195 (or 225186 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 45.

The square root of 8551665801 is about 92475.2172260222. The cubic root of 8551665801 is about 2044.9541420802.

The spelling of 8551665801 in words is "eight billion, five hundred fifty-one million, six hundred sixty-five thousand, eight hundred one".