55667719 has 2 divisors, whose sum is σ = 55667720. Its totient is φ = 55667718.

The previous prime is 55667699. The next prime is 55667743. The reversal of 55667719 is 91776655.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55667719 - 2¹¹ = 55665671 is a prime.

It is a super-2 number, since 2×55667719² = 6197789877325922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55667749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27833859 + 27833860.

It is an arithmetic number, because the mean of its divisors is an integer number (27833860).

Almost surely, 2^55667719 is an apocalyptic number.

55667719 is a deficient number, since it is larger than the sum of its proper divisors (1).

55667719 is an equidigital number, since it uses as much as digits as its factorization.

55667719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 396900, while the sum is 46.

The square root of 55667719 is about 7461.0802837123. The cubic root of 55667719 is about 381.8280317479.

The spelling of 55667719 in words is "fifty-five million, six hundred sixty-seven thousand, seven hundred nineteen".