75666493 has 8 divisors (see below), whose sum is σ = 91027520. Its totient is φ = 61443360.

The previous prime is 75666491. The next prime is 75666511. The reversal of 75666493 is 39466657.

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

It is a cyclic number.

It is not a de Polignac number, because 75666493 - 2¹ = 75666491 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75666491) 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 7 ways as a sum of consecutive naturals, for example, 284328 + ... + 284593.

It is an arithmetic number, because the mean of its divisors is an integer number (11378440).

Almost surely, 2^75666493 is an apocalyptic number.

It is an amenable number.

75666493 is a deficient number, since it is larger than the sum of its proper divisors (15361027).

75666493 is a wasteful number, since it uses less digits than its factorization.

75666493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568947.

The product of its digits is 816480, while the sum is 46.

The square root of 75666493 is about 8698.6489180792. The cubic root of 75666493 is about 422.9618548020.

The spelling of 75666493 in words is "seventy-five million, six hundred sixty-six thousand, four hundred ninety-three".