660149507 has 2 divisors, whose sum is σ = 660149508. Its totient is φ = 660149506.

The previous prime is 660149461. The next prime is 660149513. The reversal of 660149507 is 705941066.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 660149507 - 2⁶ = 660149443 is a prime.

It is not a weakly prime, because it can be changed into another prime (660149537) 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, 330074753 + 330074754.

It is an arithmetic number, because the mean of its divisors is an integer number (330074754).

Almost surely, 2^660149507 is an apocalyptic number.

660149507 is a deficient number, since it is larger than the sum of its proper divisors (1).

660149507 is an equidigital number, since it uses as much as digits as its factorization.

660149507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 660149507 is about 25693.3747686052. The cubic root of 660149507 is about 870.7245063663.

The spelling of 660149507 in words is "six hundred sixty million, one hundred forty-nine thousand, five hundred seven".