555665899 has 2 divisors, whose sum is σ = 555665900. Its totient is φ = 555665898.

The previous prime is 555665821. The next prime is 555665911. The reversal of 555665899 is 998566555.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 555665899 - 2¹¹ = 555663851 is a prime.

It is a super-2 number, since 2×555665899² = 617529182622956402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (555666899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277832949 + 277832950.

It is an arithmetic number, because the mean of its divisors is an integer number (277832950).

Almost surely, 2^555665899 is an apocalyptic number.

555665899 is a deficient number, since it is larger than the sum of its proper divisors (1).

555665899 is an equidigital number, since it uses as much as digits as its factorization.

555665899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14580000, while the sum is 58.

The square root of 555665899 is about 23572.5666612696. The cubic root of 555665899 is about 822.1251139076.

The spelling of 555665899 in words is "five hundred fifty-five million, six hundred sixty-five thousand, eight hundred ninety-nine".