20667466680 has 256 divisors, whose sum is σ = 73538150400. Its totient is φ = 4548579840.

The previous prime is 20667466667. The next prime is 20667466739. The reversal of 20667466680 is 8666476602.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 2560491 + ... + 2568549.

It is an arithmetic number, because the mean of its divisors is an integer number (287258400).

Almost surely, 2^20667466680 is an apocalyptic number.

20667466680 is a gapful number since it is divisible by the number (20) 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 20667466680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36769075200).

20667466680 is an abundant number, since it is smaller than the sum of its proper divisors (52870683720).

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

20667466680 is a wasteful number, since it uses less digits than its factorization.

20667466680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8194 (or 8190 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 51.

The spelling of 20667466680 in words is "twenty billion, six hundred sixty-seven million, four hundred sixty-six thousand, six hundred eighty".