66211914 has 8 divisors (see below), whose sum is σ = 132423840. Its totient is φ = 22070636.

The previous prime is 66211913. The next prime is 66211919. The reversal of 66211914 is 41911266.

It is a happy number.

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

66211914 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (66211913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5517654 + ... + 5517665.

It is an arithmetic number, because the mean of its divisors is an integer number (16552980).

Almost surely, 2^66211914 is an apocalyptic number.

66211914 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66211914 is a wasteful number, since it uses less digits than its factorization.

66211914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11035324.

The product of its digits is 2592, while the sum is 30.

The square root of 66211914 is about 8137.0703573215. The cubic root of 66211914 is about 404.5560628666.

The spelling of 66211914 in words is "sixty-six million, two hundred eleven thousand, nine hundred fourteen".