80666539201 has 4 divisors (see below), whose sum is σ = 81572904900. Its totient is φ = 79760173504.

The previous prime is 80666539139. The next prime is 80666539253. The reversal of 80666539201 is 10293566608.

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 22296462400 + 58370076801 = 149320^2 + 241599^2 .

It is a cyclic number.

It is not a de Polignac number, because 80666539201 - 2²³ = 80658150593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80666539271) 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, 453182716 + ... + 453182893.

It is an arithmetic number, because the mean of its divisors is an integer number (20393226225).

Almost surely, 2^80666539201 is an apocalyptic number.

It is an amenable number.

80666539201 is a deficient number, since it is larger than the sum of its proper divisors (906365699).

80666539201 is an equidigital number, since it uses as much as digits as its factorization.

80666539201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906365698.

The product of its (nonzero) digits is 466560, while the sum is 46.

The spelling of 80666539201 in words is "eighty billion, six hundred sixty-six million, five hundred thirty-nine thousand, two hundred one".