664130277 has 6 divisors (see below), whose sum is σ = 959299302. Its totient is φ = 442753512.

The previous prime is 664130263. The next prime is 664130309. The reversal of 664130277 is 772031466.

664130277 is a `hidden beast` number, since 6 + 641 + 3 + 0 + 2 + 7 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 355284801 + 308845476 = 18849^2 + 17574^2 .

It is not a de Polignac number, because 664130277 - 2¹¹ = 664128229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664130477) 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 in 5 ways as a sum of consecutive naturals, for example, 36896118 + ... + 36896135.

It is an arithmetic number, because the mean of its divisors is an integer number (159883217).

Almost surely, 2^664130277 is an apocalyptic number.

It is an amenable number.

664130277 is a deficient number, since it is larger than the sum of its proper divisors (295169025).

664130277 is a wasteful number, since it uses less digits than its factorization.

664130277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73792259 (or 73792256 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 664130277 is about 25770.7251935214. The cubic root of 664130277 is about 872.4711865319.

The spelling of 664130277 in words is "six hundred sixty-four million, one hundred thirty thousand, two hundred seventy-seven".