55993966 has 24 divisors (see below), whose sum is σ = 97962480. Its totient is φ = 23933952.

The previous prime is 55993963. The next prime is 55993981. The reversal of 55993966 is 66939955.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55993961) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72430 + ... + 73198.

It is an arithmetic number, because the mean of its divisors is an integer number (4081770).

Almost surely, 2^55993966 is an apocalyptic number.

55993966 is a deficient number, since it is larger than the sum of its proper divisors (41968514).

55993966 is a wasteful number, since it uses less digits than its factorization.

55993966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1528 (or 1521 counting only the distinct ones).

The product of its digits is 1968300, while the sum is 52.

The square root of 55993966 is about 7482.9115991037. The cubic root of 55993966 is about 382.5724948386.

The spelling of 55993966 in words is "fifty-five million, nine hundred ninety-three thousand, nine hundred sixty-six".