66020883091 has 2 divisors, whose sum is σ = 66020883092. Its totient is φ = 66020883090.

The previous prime is 66020883077. The next prime is 66020883101. The reversal of 66020883091 is 19038802066.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66020883091 - 2⁵ = 66020883059 is a prime.

It is not a weakly prime, because it can be changed into another prime (66020883011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33010441545 + 33010441546.

It is an arithmetic number, because the mean of its divisors is an integer number (33010441546).

Almost surely, 2^66020883091 is an apocalyptic number.

66020883091 is a deficient number, since it is larger than the sum of its proper divisors (1).

66020883091 is an equidigital number, since it uses as much as digits as its factorization.

66020883091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 43.

The spelling of 66020883091 in words is "sixty-six billion, twenty million, eight hundred eighty-three thousand, ninety-one".