55006666 has 32 divisors (see below), whose sum is σ = 99320256. Its totient is φ = 22512000.

The previous prime is 55006643. The next prime is 55006669. The reversal of 55006666 is 66660055.

55006666 is a modest number, since divided by 6666 gives 5500 as remainder.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (55006669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9381 + ... + 14071.

It is an arithmetic number, because the mean of its divisors is an integer number (3103758).

Almost surely, 2^55006666 is an apocalyptic number.

55006666 is the 4691-st heptagonal number.

55006666 is a deficient number, since it is larger than the sum of its proper divisors (44313590).

55006666 is a wasteful number, since it uses less digits than its factorization.

55006666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4758.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 55006666 is about 7416.6478951073. The cubic root of 55006666 is about 380.3106093834.

The spelling of 55006666 in words is "fifty-five million, six thousand, six hundred sixty-six".