20446066660 has 24 divisors (see below), whose sum is σ = 44803555776. Its totient is φ = 7822842720.

The previous prime is 20446066657. The next prime is 20446066717. The reversal of 20446066660 is 6666064402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22223526 + ... + 22224445.

It is an arithmetic number, because the mean of its divisors is an integer number (1866814824).

Almost surely, 2^20446066660 is an apocalyptic number.

20446066660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20446066660 is an abundant number, since it is smaller than the sum of its proper divisors (24357489116).

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

20446066660 is a wasteful number, since it uses less digits than its factorization.

20446066660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44448003 (or 44448001 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 40.

The spelling of 20446066660 in words is "twenty billion, four hundred forty-six million, sixty-six thousand, six hundred sixty".