55406669 has 2 divisors, whose sum is σ = 55406670. Its totient is φ = 55406668.

The previous prime is 55406657. The next prime is 55406699. The reversal of 55406669 is 96660455.

55406669 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44049769 + 11356900 = 6637^2 + 3370^2 .

It is a cyclic number.

It is not a de Polignac number, because 55406669 - 2¹² = 55402573 is a prime.

It is a super-2 number, since 2×55406669² = 6139797939351122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55406639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27703334 + 27703335.

It is an arithmetic number, because the mean of its divisors is an integer number (27703335).

Almost surely, 2^55406669 is an apocalyptic number.

It is an amenable number.

55406669 is a deficient number, since it is larger than the sum of its proper divisors (1).

55406669 is an equidigital number, since it uses as much as digits as its factorization.

55406669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 194400, while the sum is 41.

The square root of 55406669 is about 7443.5656106466. The cubic root of 55406669 is about 381.2302441075.

The spelling of 55406669 in words is "fifty-five million, four hundred six thousand, six hundred sixty-nine".