557765665 has 12 divisors (see below), whose sum is σ = 711008316. Its totient is φ = 419963648.

The previous prime is 557765657. The next prime is 557765669. The reversal of 557765665 is 566567755.

It can be written as a sum of positive squares in 6 ways, for example, as 239121 + 557526544 = 489^2 + 23612^2 .

It is not a de Polignac number, because 557765665 - 2³ = 557765657 is a prime.

It is a super-2 number, since 2×557765665² = 622205074105784450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (557765669) 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 in 11 ways as a sum of consecutive naturals, for example, 191554 + ... + 194443.

It is an arithmetic number, because the mean of its divisors is an integer number (59250693).

Almost surely, 2^557765665 is an apocalyptic number.

It is an amenable number.

557765665 is a deficient number, since it is larger than the sum of its proper divisors (153242651).

557765665 is a wasteful number, since it uses less digits than its factorization.

557765665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386036 (or 386019 counting only the distinct ones).

The product of its digits is 6615000, while the sum is 52.

The square root of 557765665 is about 23617.0630053781. The cubic root of 557765665 is about 823.1593687791.

The spelling of 557765665 in words is "five hundred fifty-seven million, seven hundred sixty-five thousand, six hundred sixty-five".