55401966 has 24 divisors (see below), whose sum is σ = 121389840. Its totient is φ = 18259296.

The previous prime is 55401937. The next prime is 55401971. The reversal of 55401966 is 66910455.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 55401966.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15690 + ... + 18893.

It is an arithmetic number, because the mean of its divisors is an integer number (5057910).

Almost surely, 2^55401966 is an apocalyptic number.

55401966 is an abundant number, since it is smaller than the sum of its proper divisors (65987874).

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

55401966 is a wasteful number, since it uses less digits than its factorization.

55401966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34680 (or 34677 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 55401966 is about 7443.2496935143. The cubic root of 55401966 is about 381.2194573400.

The spelling of 55401966 in words is "fifty-five million, four hundred one thousand, nine hundred sixty-six".