55664911 has 4 divisors (see below), whose sum is σ = 55947672. Its totient is φ = 55382152.

The previous prime is 55664897. The next prime is 55664929. The reversal of 55664911 is 11946655.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55664911 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 (55664981) 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, 141085 + ... + 141478.

It is an arithmetic number, because the mean of its divisors is an integer number (13986918).

Almost surely, 2^55664911 is an apocalyptic number.

55664911 is a deficient number, since it is larger than the sum of its proper divisors (282761).

55664911 is a wasteful number, since it uses less digits than its factorization.

55664911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282760.

The product of its digits is 32400, while the sum is 37.

The square root of 55664911 is about 7460.8921048357. The cubic root of 55664911 is about 381.8216115630.

The spelling of 55664911 in words is "fifty-five million, six hundred sixty-four thousand, nine hundred eleven".