551006660505 has 64 divisors (see below), whose sum is σ = 1028414320128. Its totient is φ = 246691061760.

The previous prime is 551006660489. The next prime is 551006660513. The reversal of 551006660505 is 505066600155.

It is not a de Polignac number, because 551006660505 - 2⁴ = 551006660489 is a prime.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 3010825 + ... + 3188585.

It is an arithmetic number, because the mean of its divisors is an integer number (16068973752).

Almost surely, 2^551006660505 is an apocalyptic number.

It is an amenable number.

551006660505 is a deficient number, since it is larger than the sum of its proper divisors (477407659623).

551006660505 is a wasteful number, since it uses less digits than its factorization.

551006660505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178386.

The product of its (nonzero) digits is 135000, while the sum is 39.

The spelling of 551006660505 in words is "five hundred fifty-one billion, six million, six hundred sixty thousand, five hundred five".