66764051 has 2 divisors, whose sum is σ = 66764052. Its totient is φ = 66764050.

The previous prime is 66764039. The next prime is 66764077. The reversal of 66764051 is 15046766.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66764051 - 2¹⁰ = 66763027 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66464051) 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, 33382025 + 33382026.

It is an arithmetic number, because the mean of its divisors is an integer number (33382026).

Almost surely, 2^66764051 is an apocalyptic number.

66764051 is a deficient number, since it is larger than the sum of its proper divisors (1).

66764051 is an equidigital number, since it uses as much as digits as its factorization.

66764051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 66764051 is about 8170.9271811711. The cubic root of 66764051 is about 405.6774740420.

The spelling of 66764051 in words is "sixty-six million, seven hundred sixty-four thousand, fifty-one".