55166087 has 2 divisors, whose sum is σ = 55166088. Its totient is φ = 55166086.

The previous prime is 55166053. The next prime is 55166141. The reversal of 55166087 is 78066155.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55166087 - 2²⁴ = 38388871 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55166087.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55166017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27583043 + 27583044.

It is an arithmetic number, because the mean of its divisors is an integer number (27583044).

Almost surely, 2^55166087 is an apocalyptic number.

55166087 is a deficient number, since it is larger than the sum of its proper divisors (1).

55166087 is an equidigital number, since it uses as much as digits as its factorization.

55166087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 55166087 is about 7427.3876295774. The cubic root of 55166087 is about 380.6776619839.

The spelling of 55166087 in words is "fifty-five million, one hundred sixty-six thousand, eighty-seven".