55448666 has 16 divisors (see below), whose sum is σ = 102367104. Its totient is φ = 21935664.

The previous prime is 55448663. The next prime is 55448693. The reversal of 55448666 is 66684455.

It is a super-2 number, since 2×55448666² = 6149109122359112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55448663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152150 + ... + 152513.

It is an arithmetic number, because the mean of its divisors is an integer number (6397944).

Almost surely, 2^55448666 is an apocalyptic number.

55448666 is a deficient number, since it is larger than the sum of its proper divisors (46918438).

55448666 is a wasteful number, since it uses less digits than its factorization.

55448666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304685.

The product of its digits is 691200, while the sum is 44.

The square root of 55448666 is about 7446.3861033390. The cubic root of 55448666 is about 381.3265410777.

The spelling of 55448666 in words is "fifty-five million, four hundred forty-eight thousand, six hundred sixty-six".