55668519 has 16 divisors (see below), whose sum is σ = 82656000. Its totient is φ = 37029528.

The previous prime is 55668517. The next prime is 55668551. The reversal of 55668519 is 91586655.

It is a happy number.

55668519 is a `hidden beast` number, since 5 + 566 + 85 + 1 + 9 = 666.

It is not a de Polignac number, because 55668519 - 2¹ = 55668517 is a prime.

It is a super-2 number, since 2×55668519² = 6197968015306722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55668511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11532 + ... + 15630.

It is an arithmetic number, because the mean of its divisors is an integer number (5166000).

Almost surely, 2^55668519 is an apocalyptic number.

55668519 is a deficient number, since it is larger than the sum of its proper divisors (26987481).

55668519 is a wasteful number, since it uses less digits than its factorization.

55668519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4611 (or 4605 counting only the distinct ones).

The product of its digits is 324000, while the sum is 45.

The square root of 55668519 is about 7461.1338950591. The cubic root of 55668519 is about 381.8298608209.

The spelling of 55668519 in words is "fifty-five million, six hundred sixty-eight thousand, five hundred nineteen".