55866995069 has 2 divisors, whose sum is σ = 55866995070. Its totient is φ = 55866995068.

The previous prime is 55866995017. The next prime is 55866995071. The reversal of 55866995069 is 96059966855.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55866995044 + 25 = 236362^2 + 5^2 .

It is a cyclic number.

It is not a de Polignac number, because 55866995069 - 2¹² = 55866990973 is a prime.

It is a super-2 number, since 2×55866995069² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 55866995071, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55866905069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27933497534 + 27933497535.

It is an arithmetic number, because the mean of its divisors is an integer number (27933497535).

Almost surely, 2^55866995069 is an apocalyptic number.

It is an amenable number.

55866995069 is a deficient number, since it is larger than the sum of its proper divisors (1).

55866995069 is an equidigital number, since it uses as much as digits as its factorization.

55866995069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 157464000, while the sum is 68.

The spelling of 55866995069 in words is "fifty-five billion, eight hundred sixty-six million, nine hundred ninety-five thousand, sixty-nine".