55066155657 has 24 divisors (see below), whose sum is σ = 74964792000. Its totient is φ = 35954687808.

The previous prime is 55066155607. The next prime is 55066155667. The reversal of 55066155657 is 75655166055.

It is not a de Polignac number, because 55066155657 - 2²³ = 55057767049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55066155607) 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 23 ways as a sum of consecutive naturals, for example, 5042319 + ... + 5053227.

It is an arithmetic number, because the mean of its divisors is an integer number (3123533000).

Almost surely, 2^55066155657 is an apocalyptic number.

It is an amenable number.

55066155657 is a deficient number, since it is larger than the sum of its proper divisors (19898636343).

55066155657 is a wasteful number, since it uses less digits than its factorization.

55066155657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11617 (or 11564 counting only the distinct ones).

The product of its (nonzero) digits is 4725000, while the sum is 51.

The spelling of 55066155657 in words is "fifty-five billion, sixty-six million, one hundred fifty-five thousand, six hundred fifty-seven".