66798211 has 8 divisors (see below), whose sum is σ = 69246848. Its totient is φ = 64368000.

The previous prime is 66798197. The next prime is 66798229. The reversal of 66798211 is 11289766.

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 66798211 - 2¹³ = 66790019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66798311) 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, 3001 + ... + 11941.

It is an arithmetic number, because the mean of its divisors is an integer number (8655856).

Almost surely, 2^66798211 is an apocalyptic number.

66798211 is a deficient number, since it is larger than the sum of its proper divisors (2448637).

66798211 is a wasteful number, since it uses less digits than its factorization.

66798211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9213.

The product of its digits is 36288, while the sum is 40.

The square root of 66798211 is about 8173.0172519089. The cubic root of 66798211 is about 405.7466508894.

The spelling of 66798211 in words is "sixty-six million, seven hundred ninety-eight thousand, two hundred eleven".