66364091 has 2 divisors, whose sum is σ = 66364092. Its totient is φ = 66364090.

The previous prime is 66364079. The next prime is 66364099. The reversal of 66364091 is 19046366.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66364091 - 2⁶ = 66364027 is a prime.

It is not a weakly prime, because it can be changed into another prime (66364099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33182045 + 33182046.

It is an arithmetic number, because the mean of its divisors is an integer number (33182046).

Almost surely, 2^66364091 is an apocalyptic number.

66364091 is a deficient number, since it is larger than the sum of its proper divisors (1).

66364091 is an equidigital number, since it uses as much as digits as its factorization.

66364091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 66364091 is about 8146.4158376552. The cubic root of 66364091 is about 404.8657605199.

The spelling of 66364091 in words is "sixty-six million, three hundred sixty-four thousand, ninety-one".