75006666 has 24 divisors (see below), whose sum is σ = 185731104. Its totient is φ = 21430440.

The previous prime is 75006653. The next prime is 75006691. The reversal of 75006666 is 66660057.

It is a self number, because there is not a number n which added to its sum of digits gives 75006666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 297520 + ... + 297771.

It is an arithmetic number, because the mean of its divisors is an integer number (7738796).

Almost surely, 2^75006666 is an apocalyptic number.

75006666 is an abundant number, since it is smaller than the sum of its proper divisors (110724438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

75006666 is a wasteful number, since it uses less digits than its factorization.

75006666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595306 (or 595303 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 75006666 is about 8660.6388909826. The cubic root of 75006666 is about 421.7288263300.

It can be divided in two parts, 7500 and 6666, that multiplied together give a triangular number (49995000 = T₉₉₉₉).

The spelling of 75006666 in words is "seventy-five million, six thousand, six hundred sixty-six".