66708851 has 8 divisors (see below), whose sum is σ = 73156608. Its totient is φ = 60325000.

The previous prime is 66708847. The next prime is 66708853. The reversal of 66708851 is 15880766.

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 66708851 - 2² = 66708847 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66708799 and 66708808.

It is not an unprimeable number, because it can be changed into a prime (66708853) 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, 13775 + ... + 17976.

It is an arithmetic number, because the mean of its divisors is an integer number (9144576).

Almost surely, 2^66708851 is an apocalyptic number.

66708851 is a deficient number, since it is larger than the sum of its proper divisors (6447757).

66708851 is a wasteful number, since it uses less digits than its factorization.

66708851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31953.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 66708851 is about 8167.5486530537. The cubic root of 66708851 is about 405.5656395510.

The spelling of 66708851 in words is "sixty-six million, seven hundred eight thousand, eight hundred fifty-one".