75687666 has 8 divisors (see below), whose sum is σ = 151375344. Its totient is φ = 25229220.

The previous prime is 75687637. The next prime is 75687691. The reversal of 75687666 is 66678657.

It is a happy number.

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

75687666 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6307300 + ... + 6307311.

It is an arithmetic number, because the mean of its divisors is an integer number (18921918).

Almost surely, 2^75687666 is an apocalyptic number.

75687666 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.

75687666 is a wasteful number, since it uses less digits than its factorization.

75687666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12614616.

The product of its digits is 2540160, while the sum is 51.

The square root of 75687666 is about 8699.8658610349. The cubic root of 75687666 is about 423.0013021885.

Subtracting from 75687666 its reverse (66678657), we obtain a palindrome (9009009).

The spelling of 75687666 in words is "seventy-five million, six hundred eighty-seven thousand, six hundred sixty-six".