55668081 has 64 divisors (see below), whose sum is σ = 98150400. Its totient is φ = 27288576.

The previous prime is 55668077. The next prime is 55668083. The reversal of 55668081 is 18086655.

It is not a de Polignac number, because 55668081 - 2² = 55668077 is a prime.

It is a super-2 number, since 2×55668081² = 6197870484445122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55668083) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 196566 + ... + 196848.

It is an arithmetic number, because the mean of its divisors is an integer number (1533600).

Almost surely, 2^55668081 is an apocalyptic number.

55668081 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

55668081 is a deficient number, since it is larger than the sum of its proper divisors (42482319).

55668081 is a wasteful number, since it uses less digits than its factorization.

55668081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358.

The product of its (nonzero) digits is 57600, while the sum is 39.

The square root of 55668081 is about 7461.1045428944. The cubic root of 55668081 is about 381.8288594056.

The spelling of 55668081 in words is "fifty-five million, six hundred sixty-eight thousand, eighty-one".