66902281220 has 12 divisors (see below), whose sum is σ = 140494790604. Its totient is φ = 26760912480.

The previous prime is 66902281217. The next prime is 66902281339. The reversal of 66902281220 is 2218220966.

It can be written as a sum of positive squares in 2 ways, for example, as 20787295684 + 46114985536 = 144178^2 + 214744^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1672557011 + ... + 1672557050.

It is an arithmetic number, because the mean of its divisors is an integer number (11707899217).

Almost surely, 2^66902281220 is an apocalyptic number.

It is an amenable number.

66902281220 is an abundant number, since it is smaller than the sum of its proper divisors (73592509384).

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

66902281220 is a wasteful number, since it uses less digits than its factorization.

66902281220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3345114070 (or 3345114068 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The spelling of 66902281220 in words is "sixty-six billion, nine hundred two million, two hundred eighty-one thousand, two hundred twenty".