55940511543666 has 64 divisors (see below), whose sum is σ = 118989266872320. Its totient is φ = 17471895978240.

The previous prime is 55940511543659. The next prime is 55940511543667. The reversal of 55940511543666 is 66634511504955.

It is not an unprimeable number, because it can be changed into a prime (55940511543667) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 799217931 + ... + 799287921.

It is an arithmetic number, because the mean of its divisors is an integer number (1859207294880).

Almost surely, 2^{55940511543666} is an apocalyptic number.

55940511543666 is an abundant number, since it is smaller than the sum of its proper divisors (63048755328654).

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

55940511543666 is a wasteful number, since it uses less digits than its factorization.

55940511543666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104759.

The product of its (nonzero) digits is 58320000, while the sum is 60.

The spelling of 55940511543666 in words is "fifty-five trillion, nine hundred forty billion, five hundred eleven million, five hundred forty-three thousand, six hundred sixty-six".