66222132240 has 80 divisors (see below), whose sum is σ = 223951219776. Its totient is φ = 16053849600.

The previous prime is 66222132191. The next prime is 66222132253. The reversal of 66222132240 is 4223122266.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 66222132198 and 66222132207.

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, 12539431 + ... + 12544710.

Almost surely, 2^66222132240 is an apocalyptic number.

66222132240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66222132240 is an abundant number, since it is smaller than the sum of its proper divisors (157729087536).

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

66222132240 is a wasteful number, since it uses less digits than its factorization.

66222132240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25084168 (or 25084162 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The spelling of 66222132240 in words is "sixty-six billion, two hundred twenty-two million, one hundred thirty-two thousand, two hundred forty".