8665551801 has 12 divisors (see below), whose sum is σ = 12980497712. Its totient is φ = 5777034372.

The previous prime is 8665551793. The next prime is 8665551803. The reversal of 8665551801 is 1081555668.

8665551801 is a `hidden beast` number, since 86 + 6 + 55 + 518 + 0 + 1 = 666.

It is not a de Polignac number, because 8665551801 - 2³ = 8665551793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8665551803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17830111 + ... + 17830596.

Almost surely, 2^8665551801 is an apocalyptic number.

8665551801 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

8665551801 is a deficient number, since it is larger than the sum of its proper divisors (4314945911).

8665551801 is an equidigital number, since it uses as much as digits as its factorization.

8665551801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35660722 (or 35660710 counting only the distinct ones).

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

The square root of 8665551801 is about 93088.9456434006. The cubic root of 8665551801 is about 2053.9919676525.

The spelling of 8665551801 in words is "eight billion, six hundred sixty-five million, five hundred fifty-one thousand, eight hundred one".