55061660 has 24 divisors (see below), whose sum is σ = 115804080. Its totient is φ = 21991424.

The previous prime is 55061651. The next prime is 55061663. The reversal of 55061660 is 6616055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55061663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14876 + ... + 18204.

It is an arithmetic number, because the mean of its divisors is an integer number (4825170).

Almost surely, 2^55061660 is an apocalyptic number.

It is an amenable number.

55061660 is an abundant number, since it is smaller than the sum of its proper divisors (60742420).

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

55061660 is a wasteful number, since it uses less digits than its factorization.

55061660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4165 (or 4163 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 55061660 is about 7420.3544389739. The cubic root of 55061660 is about 380.4373081822.

The spelling of 55061660 in words is "fifty-five million, sixty-one thousand, six hundred sixty".