55668419 has 2 divisors, whose sum is σ = 55668420. Its totient is φ = 55668418.

The previous prime is 55668373. The next prime is 55668427. The reversal of 55668419 is 91486655.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55668419 is a prime.

It is a super-2 number, since 2×55668419² = 6197945747919122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55668419.

It is not a weakly prime, because it can be changed into another prime (55668469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27834209 + 27834210.

It is an arithmetic number, because the mean of its divisors is an integer number (27834210).

Almost surely, 2^55668419 is an apocalyptic number.

55668419 is a deficient number, since it is larger than the sum of its proper divisors (1).

55668419 is an equidigital number, since it uses as much as digits as its factorization.

55668419 is an evil number, because the sum of its binary digits is even.

The product of its digits is 259200, while the sum is 44.

The square root of 55668419 is about 7461.1271936618. The cubic root of 55668419 is about 381.8296321877.

The spelling of 55668419 in words is "fifty-five million, six hundred sixty-eight thousand, four hundred nineteen".