660275377 has 2 divisors, whose sum is σ = 660275378. Its totient is φ = 660275376.

The previous prime is 660275353. The next prime is 660275383. The reversal of 660275377 is 773572066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 627051681 + 33223696 = 25041^2 + 5764^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-660275377 is a prime.

It is not a weakly prime, because it can be changed into another prime (660275177) 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, 330137688 + 330137689.

It is an arithmetic number, because the mean of its divisors is an integer number (330137689).

Almost surely, 2^660275377 is an apocalyptic number.

It is an amenable number.

660275377 is a deficient number, since it is larger than the sum of its proper divisors (1).

660275377 is an equidigital number, since it uses as much as digits as its factorization.

660275377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 370440, while the sum is 43.

The square root of 660275377 is about 25695.8241159921. The cubic root of 660275377 is about 870.7798428861.

The spelling of 660275377 in words is "six hundred sixty million, two hundred seventy-five thousand, three hundred seventy-seven".