55663965 has 24 divisors (see below), whose sum is σ = 110268288. Its totient is φ = 25446240.

The previous prime is 55663921. The next prime is 55663987. The reversal of 55663965 is 56936655.

55663965 is a `hidden beast` number, since 5 + 5 + 6 + 639 + 6 + 5 = 666.

It is not a de Polignac number, because 55663965 - 2⁹ = 55663453 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 55663965.

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, 88041 + ... + 88670.

It is an arithmetic number, because the mean of its divisors is an integer number (4594512).

Almost surely, 2^55663965 is an apocalyptic number.

It is an amenable number.

55663965 is a deficient number, since it is larger than the sum of its proper divisors (54604323).

55663965 is a wasteful number, since it uses less digits than its factorization.

55663965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176729 (or 176726 counting only the distinct ones).

The product of its digits is 729000, while the sum is 45.

The square root of 55663965 is about 7460.8287073220. The cubic root of 55663965 is about 381.8194485889.

The spelling of 55663965 in words is "fifty-five million, six hundred sixty-three thousand, nine hundred sixty-five".