55356660 has 36 divisors (see below), whose sum is σ = 167915748. Its totient is φ = 14761728.

The previous prime is 55356619. The next prime is 55356661. The reversal of 55356660 is 6665355.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16941456 + 38415204 = 4116^2 + 6198^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55356661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 153589 + ... + 153948.

Almost surely, 2^55356660 is an apocalyptic number.

It is an amenable number.

55356660 is an abundant number, since it is smaller than the sum of its proper divisors (112559088).

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

55356660 is a wasteful number, since it uses less digits than its factorization.

55356660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307552 (or 307547 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 36.

The square root of 55356660 is about 7440.2056423193. The cubic root of 55356660 is about 381.1155125395.

The spelling of 55356660 in words is "fifty-five million, three hundred fifty-six thousand, six hundred sixty".