20604000066 has 16 divisors (see below), whose sum is σ = 44377846464. Its totient is φ = 6339692304.

The previous prime is 20604000059. The next prime is 20604000077. The reversal of 20604000066 is 66000040602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132076846 + ... + 132077001.

It is an arithmetic number, because the mean of its divisors is an integer number (2773615404).

Almost surely, 2^20604000066 is an apocalyptic number.

20604000066 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20604000066 is an abundant number, since it is smaller than the sum of its proper divisors (23773846398).

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

20604000066 is a wasteful number, since it uses less digits than its factorization.

20604000066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264153865.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 20604000066 its reverse (66000040602), we get a palindrome (86604040668).

The spelling of 20604000066 in words is "twenty billion, six hundred four million, sixty-six", and thus it is an aban number.