66675333420 has 144 divisors (see below), whose sum is σ = 211362540480. Its totient is φ = 16981206528.

The previous prime is 66675333419. The next prime is 66675333421. The reversal of 66675333420 is 2433357666.

It is an interprime number because it is at equal distance from previous prime (66675333419) and next prime (66675333421).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (66675333421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2790886 + ... + 2814674.

It is an arithmetic number, because the mean of its divisors is an integer number (1467795420).

Almost surely, 2^66675333420 is an apocalyptic number.

66675333420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66675333420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105681270240).

66675333420 is an abundant number, since it is smaller than the sum of its proper divisors (144687207060).

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

66675333420 is a wasteful number, since it uses less digits than its factorization.

66675333420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24504 (or 24499 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 45.

The spelling of 66675333420 in words is "sixty-six billion, six hundred seventy-five million, three hundred thirty-three thousand, four hundred twenty".