55666172017 has 8 divisors (see below), whose sum is σ = 58529724840. Its totient is φ = 52865554560.

The previous prime is 55666172011. The next prime is 55666172071. The reversal of 55666172017 is 71027166655.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10403184016 + 45262988001 = 101996^2 + 212751^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55666172017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55666172011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15732028 + ... + 15735565.

It is an arithmetic number, because the mean of its divisors is an integer number (7316215605).

Almost surely, 2^55666172017 is an apocalyptic number.

It is an amenable number.

55666172017 is a deficient number, since it is larger than the sum of its proper divisors (2863552823).

55666172017 is a wasteful number, since it uses less digits than its factorization.

55666172017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31467683.

The product of its (nonzero) digits is 529200, while the sum is 46.

The spelling of 55666172017 in words is "fifty-five billion, six hundred sixty-six million, one hundred seventy-two thousand, seventeen".