55240668 has 72 divisors (see below), whose sum is σ = 160462848. Its totient is φ = 15696288.

The previous prime is 55240643. The next prime is 55240693. The reversal of 55240668 is 86604255.

55240668 is a `hidden beast` number, since 552 + 40 + 6 + 68 = 666.

It is an interprime number because it is at equal distance from previous prime (55240643) and next prime (55240693).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55705 + ... + 56687.

Almost surely, 2^55240668 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55240668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80231424).

55240668 is an abundant number, since it is smaller than the sum of its proper divisors (105222180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55240668 is a wasteful number, since it uses less digits than its factorization.

55240668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1223 (or 1218 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 55240668 is about 7432.4066088986. The cubic root of 55240668 is about 380.8491353017.

The spelling of 55240668 in words is "fifty-five million, two hundred forty thousand, six hundred sixty-eight".