55006647 has 4 divisors (see below), whose sum is σ = 73342200. Its totient is φ = 36671096.

The previous prime is 55006643. The next prime is 55006669. The reversal of 55006647 is 74660055.

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

It is a cyclic number.

It is not a de Polignac number, because 55006647 - 2² = 55006643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55006643) 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, 9167772 + ... + 9167777.

It is an arithmetic number, because the mean of its divisors is an integer number (18335550).

Almost surely, 2^55006647 is an apocalyptic number.

55006647 is a deficient number, since it is larger than the sum of its proper divisors (18335553).

55006647 is a wasteful number, since it uses less digits than its factorization.

55006647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18335552.

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 55006647 is about 7416.6466142051. The cubic root of 55006647 is about 380.3105655954.

The spelling of 55006647 in words is "fifty-five million, six thousand, six hundred forty-seven".