55668091 has 4 divisors (see below), whose sum is σ = 57172672. Its totient is φ = 54163512.

The previous prime is 55668083. The next prime is 55668103. The reversal of 55668091 is 19086655.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55668091 - 2³ = 55668083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55668191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 752235 + ... + 752308.

It is an arithmetic number, because the mean of its divisors is an integer number (14293168).

Almost surely, 2^55668091 is an apocalyptic number.

55668091 is a deficient number, since it is larger than the sum of its proper divisors (1504581).

55668091 is a wasteful number, since it uses less digits than its factorization.

55668091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1504580.

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 55668091 is about 7461.1052130365. The cubic root of 55668091 is about 381.8288822690.

The spelling of 55668091 in words is "fifty-five million, six hundred sixty-eight thousand, ninety-one".