55066661700 has 144 divisors (see below), whose sum is σ = 163622694144. Its totient is φ = 14291942400.

The previous prime is 55066661659. The next prime is 55066661717. The reversal of 55066661700 is 716666055.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2541312 + ... + 2562888.

Almost surely, 2^55066661700 is an apocalyptic number.

55066661700 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55066661700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81811347072).

55066661700 is an abundant number, since it is smaller than the sum of its proper divisors (108556032444).

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

55066661700 is a wasteful number, since it uses less digits than its factorization.

55066661700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21822 (or 21815 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 42.

The spelling of 55066661700 in words is "fifty-five billion, sixty-six million, six hundred sixty-one thousand, seven hundred".