55670405 has 16 divisors (see below), whose sum is σ = 77791104. Its totient is φ = 37452480.

The previous prime is 55670371. The next prime is 55670441. The reversal of 55670405 is 50407655.

It is a happy number.

55670405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55670405 - 2⁸ = 55670149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13151 + ... + 16860.

It is an arithmetic number, because the mean of its divisors is an integer number (4861944).

Almost surely, 2^55670405 is an apocalyptic number.

It is an amenable number.

55670405 is a deficient number, since it is larger than the sum of its proper divisors (22120699).

55670405 is a wasteful number, since it uses less digits than its factorization.

55670405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30076.

The product of its (nonzero) digits is 21000, while the sum is 32.

The square root of 55670405 is about 7461.2602822848. The cubic root of 55670405 is about 381.8341727911.

The spelling of 55670405 in words is "fifty-five million, six hundred seventy thousand, four hundred five".