75666666 has 8 divisors (see below), whose sum is σ = 151333344. Its totient is φ = 25222220.

The previous prime is 75666649. The next prime is 75666667. The reversal of 75666666 is 66666657.

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

75666666 is an admirable number.

75666666 is a modest number, since divided by 66666 gives 756 as remainder.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (75666667) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 6305550 + ... + 6305561.

It is an arithmetic number, because the mean of its divisors is an integer number (18916668).

Almost surely, 2^75666666 is an apocalyptic number.

75666666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

75666666 is a wasteful number, since it uses less digits than its factorization.

75666666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12611116.

The product of its digits is 1632960, while the sum is 48.

The square root of 75666666 is about 8698.6588621465. The cubic root of 75666666 is about 422.9621771479.

Subtracting from 75666666 its reverse (66666657), we obtain a palindrome (9000009).

The spelling of 75666666 in words is "seventy-five million, six hundred sixty-six thousand, six hundred sixty-six".