66151387 has 2 divisors, whose sum is σ = 66151388. Its totient is φ = 66151386.

The previous prime is 66151373. The next prime is 66151391. The reversal of 66151387 is 78315166.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66151387 - 2⁷ = 66151259 is a prime.

It is not a weakly prime, because it can be changed into another prime (66151307) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33075693 + 33075694.

It is an arithmetic number, because the mean of its divisors is an integer number (33075694).

Almost surely, 2^66151387 is an apocalyptic number.

66151387 is a deficient number, since it is larger than the sum of its proper divisors (1).

66151387 is an equidigital number, since it uses as much as digits as its factorization.

66151387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 37.

The square root of 66151387 is about 8133.3502936982. The cubic root of 66151387 is about 404.4327515745.

The spelling of 66151387 in words is "sixty-six million, one hundred fifty-one thousand, three hundred eighty-seven".