665006655555 has 48 divisors (see below), whose sum is σ = 1257689328480. Its totient is φ = 322370496000.

The previous prime is 665006655539. The next prime is 665006655559. The reversal of 665006655555 is 555556600566.

It is not a de Polignac number, because 665006655555 - 2⁴ = 665006655539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (665006655559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2755701 + ... + 2987289.

It is an arithmetic number, because the mean of its divisors is an integer number (26201861010).

Almost surely, 2^665006655555 is an apocalyptic number.

665006655555 is a deficient number, since it is larger than the sum of its proper divisors (592682672925).

665006655555 is a wasteful number, since it uses less digits than its factorization.

665006655555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237412 (or 237409 counting only the distinct ones).

The product of its (nonzero) digits is 20250000, while the sum is 54.

The spelling of 665006655555 in words is "six hundred sixty-five billion, six million, six hundred fifty-five thousand, five hundred fifty-five".