55319966 has 8 divisors (see below), whose sum is σ = 89363064. Its totient is φ = 25532280.

The previous prime is 55319939. The next prime is 55319981. The reversal of 55319966 is 66991355.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1063820 + ... + 1063871.

It is an arithmetic number, because the mean of its divisors is an integer number (11170383).

Almost surely, 2^55319966 is an apocalyptic number.

55319966 is a deficient number, since it is larger than the sum of its proper divisors (34043098).

55319966 is a wasteful number, since it uses less digits than its factorization.

55319966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2127706.

The product of its digits is 218700, while the sum is 44.

The square root of 55319966 is about 7437.7393070744. The cubic root of 55319966 is about 381.0312845307.

The spelling of 55319966 in words is "fifty-five million, three hundred nineteen thousand, nine hundred sixty-six".