55001666651 has 2 divisors, whose sum is σ = 55001666652. Its totient is φ = 55001666650.

The previous prime is 55001666639. The next prime is 55001666663. The reversal of 55001666651 is 15666610055.

It is a balanced prime because it is at equal distance from previous prime (55001666639) and next prime (55001666663).

It is a cyclic number.

It is not a de Polignac number, because 55001666651 - 2²⁶ = 54934557787 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55001666599 and 55001666608.

It is not a weakly prime, because it can be changed into another prime (55001686651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27500833325 + 27500833326.

It is an arithmetic number, because the mean of its divisors is an integer number (27500833326).

Almost surely, 2^55001666651 is an apocalyptic number.

55001666651 is a deficient number, since it is larger than the sum of its proper divisors (1).

55001666651 is an equidigital number, since it uses as much as digits as its factorization.

55001666651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162000, while the sum is 41.

The spelling of 55001666651 in words is "fifty-five billion, one million, six hundred sixty-six thousand, six hundred fifty-one".