55551606 has 16 divisors (see below), whose sum is σ = 121203648. Its totient is φ = 16833800.

The previous prime is 55551599. The next prime is 55551619. The reversal of 55551606 is 60615555.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 420780 + ... + 420911.

It is an arithmetic number, because the mean of its divisors is an integer number (7575228).

Almost surely, 2^55551606 is an apocalyptic number.

55551606 is an abundant number, since it is smaller than the sum of its proper divisors (65652042).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55551606 is a wasteful number, since it uses less digits than its factorization.

55551606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841707.

The product of its (nonzero) digits is 22500, while the sum is 33.

The square root of 55551606 is about 7453.2949760492. The cubic root of 55551606 is about 381.5623717452.

The spelling of 55551606 in words is "fifty-five million, five hundred fifty-one thousand, six hundred six".