55166401 has 2 divisors, whose sum is σ = 55166402. Its totient is φ = 55166400.

The previous prime is 55166359. The next prime is 55166417. The reversal of 55166401 is 10466155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55115776 + 50625 = 7424^2 + 225^2 .

It is a cyclic number.

It is not a de Polignac number, because 55166401 - 2¹⁵ = 55133633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55166401.

It is not a weakly prime, because it can be changed into another prime (55166471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27583200 + 27583201.

It is an arithmetic number, because the mean of its divisors is an integer number (27583201).

Almost surely, 2^55166401 is an apocalyptic number.

It is an amenable number.

55166401 is a deficient number, since it is larger than the sum of its proper divisors (1).

55166401 is an equidigital number, since it uses as much as digits as its factorization.

55166401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 55166401 is about 7427.4087675312. The cubic root of 55166401 is about 380.6783842426.

The spelling of 55166401 in words is "fifty-five million, one hundred sixty-six thousand, four hundred one".