55663787 has 8 divisors (see below), whose sum is σ = 59420160. Its totient is φ = 51990120.

The previous prime is 55663771. The next prime is 55663807. The reversal of 55663787 is 78736655.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55663787 - 2⁴ = 55663771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55663747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19283 + ... + 21980.

It is an arithmetic number, because the mean of its divisors is an integer number (7427520).

Almost surely, 2^55663787 is an apocalyptic number.

55663787 is a deficient number, since it is larger than the sum of its proper divisors (3756373).

55663787 is a wasteful number, since it uses less digits than its factorization.

55663787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41353.

The product of its digits is 1058400, while the sum is 47.

The square root of 55663787 is about 7460.8167783427. The cubic root of 55663787 is about 381.8190415995.

The spelling of 55663787 in words is "fifty-five million, six hundred sixty-three thousand, seven hundred eighty-seven".