55645966 has 8 divisors (see below), whose sum is σ = 84644784. Its totient is φ = 27431040.

The previous prime is 55645963. The next prime is 55646021. The reversal of 55645966 is 66954655.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55645963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195795 + ... + 196078.

It is an arithmetic number, because the mean of its divisors is an integer number (10580598).

Almost surely, 2^55645966 is an apocalyptic number.

55645966 is a deficient number, since it is larger than the sum of its proper divisors (28998818).

55645966 is a wasteful number, since it uses less digits than its factorization.

55645966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391946.

The product of its digits is 972000, while the sum is 46.

The square root of 55645966 is about 7459.6223765014. The cubic root of 55645966 is about 381.7782902493.

The spelling of 55645966 in words is "fifty-five million, six hundred forty-five thousand, nine hundred sixty-six".