80066621 has 2 divisors, whose sum is σ = 80066622. Its totient is φ = 80066620.

The previous prime is 80066603. The next prime is 80066653. The reversal of 80066621 is 12666008.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45091225 + 34975396 = 6715^2 + 5914^2 .

It is a cyclic number.

It is not a de Polignac number, because 80066621 - 2²² = 75872317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80066681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40033310 + 40033311.

It is an arithmetic number, because the mean of its divisors is an integer number (40033311).

Almost surely, 2^80066621 is an apocalyptic number.

It is an amenable number.

80066621 is a deficient number, since it is larger than the sum of its proper divisors (1).

80066621 is an equidigital number, since it uses as much as digits as its factorization.

80066621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 80066621 is about 8947.9953620909. The cubic root of 80066621 is about 431.0065136477.

The spelling of 80066621 in words is "eighty million, sixty-six thousand, six hundred twenty-one".