80669812973 has 2 divisors, whose sum is σ = 80669812974. Its totient is φ = 80669812972.

The previous prime is 80669812903. The next prime is 80669812987. The reversal of 80669812973 is 37921896608.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68831720164 + 11838092809 = 262358^2 + 108803^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80669812973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80669812903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40334906486 + 40334906487.

It is an arithmetic number, because the mean of its divisors is an integer number (40334906487).

Almost surely, 2^80669812973 is an apocalyptic number.

It is an amenable number.

80669812973 is a deficient number, since it is larger than the sum of its proper divisors (1).

80669812973 is an equidigital number, since it uses as much as digits as its factorization.

80669812973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7838208, while the sum is 59.

The spelling of 80669812973 in words is "eighty billion, six hundred sixty-nine million, eight hundred twelve thousand, nine hundred seventy-three".