66100789 has 8 divisors (see below), whose sum is σ = 66677688. Its totient is φ = 65526720.

The previous prime is 66100729. The next prime is 66100807. The reversal of 66100789 is 98700166.

It can be written as a sum of positive squares in 4 ways, for example, as 7700625 + 58400164 = 2775^2 + 7642^2 .

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 66100789 - 2¹¹ = 66098741 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 (66100729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82539 + ... + 83335.

It is an arithmetic number, because the mean of its divisors is an integer number (8334711).

Almost surely, 2^66100789 is an apocalyptic number.

It is an amenable number.

66100789 is a deficient number, since it is larger than the sum of its proper divisors (576899).

66100789 is a wasteful number, since it uses less digits than its factorization.

66100789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1415.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 66100789 is about 8130.2391723737. The cubic root of 66100789 is about 404.3296108398.

The spelling of 66100789 in words is "sixty-six million, one hundred thousand, seven hundred eighty-nine".