66148387 has 2 divisors, whose sum is σ = 66148388. Its totient is φ = 66148386.

The previous prime is 66148373. The next prime is 66148393. The reversal of 66148387 is 78384166.

66148387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66148387 - 2¹⁹ = 65624099 is a prime.

It is not a weakly prime, because it can be changed into another prime (66148307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33074193 + 33074194.

It is an arithmetic number, because the mean of its divisors is an integer number (33074194).

Almost surely, 2^66148387 is an apocalyptic number.

66148387 is a deficient number, since it is larger than the sum of its proper divisors (1).

66148387 is an equidigital number, since it uses as much as digits as its factorization.

66148387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 43.

The square root of 66148387 is about 8133.1658657622. The cubic root of 66148387 is about 404.4266377365.

The spelling of 66148387 in words is "sixty-six million, one hundred forty-eight thousand, three hundred eighty-seven".