66763091 has 2 divisors, whose sum is σ = 66763092. Its totient is φ = 66763090.

The previous prime is 66763087. The next prime is 66763153. The reversal of 66763091 is 19036766.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66763091 - 2² = 66763087 is a prime.

It is not a weakly prime, because it can be changed into another prime (66763591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33381545 + 33381546.

It is an arithmetic number, because the mean of its divisors is an integer number (33381546).

Almost surely, 2^66763091 is an apocalyptic number.

66763091 is a deficient number, since it is larger than the sum of its proper divisors (1).

66763091 is an equidigital number, since it uses as much as digits as its factorization.

66763091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 66763091 is about 8170.8684360966. The cubic root of 66763091 is about 405.6755296211.

The spelling of 66763091 in words is "sixty-six million, seven hundred sixty-three thousand, ninety-one".