55665259999 has 2 divisors, whose sum is σ = 55665260000. Its totient is φ = 55665259998.

The previous prime is 55665259987. The next prime is 55665260039. The reversal of 55665259999 is 99995256655.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55665259999 - 2²⁵ = 55631705567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55665239999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27832629999 + 27832630000.

It is an arithmetic number, because the mean of its divisors is an integer number (27832630000).

Almost surely, 2^55665259999 is an apocalyptic number.

55665259999 is a deficient number, since it is larger than the sum of its proper divisors (1).

55665259999 is an equidigital number, since it uses as much as digits as its factorization.

55665259999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 295245000, while the sum is 70.

The spelling of 55665259999 in words is "fifty-five billion, six hundred sixty-five million, two hundred fifty-nine thousand, nine hundred ninety-nine".