66331766 has 8 divisors (see below), whose sum is σ = 101128944. Its totient is φ = 32622120.

The previous prime is 66331751. The next prime is 66331813. The reversal of 66331766 is 66713366.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271730 + ... + 271973.

It is an arithmetic number, because the mean of its divisors is an integer number (12641118).

Almost surely, 2^66331766 is an apocalyptic number.

66331766 is a deficient number, since it is larger than the sum of its proper divisors (34797178).

66331766 is a wasteful number, since it uses less digits than its factorization.

66331766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543766.

The product of its digits is 81648, while the sum is 38.

The square root of 66331766 is about 8144.4315946541. The cubic root of 66331766 is about 404.8000150695.

The spelling of 66331766 in words is "sixty-six million, three hundred thirty-one thousand, seven hundred sixty-six".