55616670779 has 2 divisors, whose sum is σ = 55616670780. Its totient is φ = 55616670778.

The previous prime is 55616670763. The next prime is 55616670797. The reversal of 55616670779 is 97707661655.

Together with next prime (55616670797) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55616670779 - 2⁴ = 55616670763 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (55616670709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27808335389 + 27808335390.

It is an arithmetic number, because the mean of its divisors is an integer number (27808335390).

Almost surely, 2^55616670779 is an apocalyptic number.

55616670779 is a deficient number, since it is larger than the sum of its proper divisors (1).

55616670779 is an equidigital number, since it uses as much as digits as its factorization.

55616670779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16669800, while the sum is 59.

The spelling of 55616670779 in words is "fifty-five billion, six hundred sixteen million, six hundred seventy thousand, seven hundred seventy-nine".