66483220 has 48 divisors (see below), whose sum is σ = 145248768. Its totient is φ = 25534080.

The previous prime is 66483187. The next prime is 66483233. The reversal of 66483220 is 2238466.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96999 + ... + 97681.

It is an arithmetic number, because the mean of its divisors is an integer number (3026016).

Almost surely, 2^66483220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66483220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72624384).

66483220 is an abundant number, since it is smaller than the sum of its proper divisors (78765548).

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

66483220 is a wasteful number, since it uses less digits than its factorization.

66483220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880 (or 878 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 66483220 is about 8153.7243024277. The cubic root of 66483220 is about 405.1078714844.

The spelling of 66483220 in words is "sixty-six million, four hundred eighty-three thousand, two hundred twenty".