55717663 has 4 divisors (see below), whose sum is σ = 55732600. Its totient is φ = 55702728.

The previous prime is 55717657. The next prime is 55717667. The reversal of 55717663 is 36671755.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 55717663 - 2⁵ = 55717631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55717667) 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, 3388 + ... + 11086.

It is an arithmetic number, because the mean of its divisors is an integer number (13933150).

Almost surely, 2^55717663 is an apocalyptic number.

55717663 is a deficient number, since it is larger than the sum of its proper divisors (14937).

55717663 is an equidigital number, since it uses as much as digits as its factorization.

55717663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14936.

The product of its digits is 132300, while the sum is 40.

The square root of 55717663 is about 7464.4265017481. The cubic root of 55717663 is about 381.9421871885.

The spelling of 55717663 in words is "fifty-five million, seven hundred seventeen thousand, six hundred sixty-three".