20346665446666 has 32 divisors (see below), whose sum is σ = 33479222071680. Its totient is φ = 9217655672256.

The previous prime is 20346665446651. The next prime is 20346665446769. The reversal of 20346665446666 is 66664456664302.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20346665446598 and 20346665446607.

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 15 ways as a sum of consecutive naturals, for example, 33245766 + ... + 33852241.

It is an arithmetic number, because the mean of its divisors is an integer number (1046225689740).

Almost surely, 2^{20346665446666} is an apocalyptic number.

20346665446666 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20346665446666 is a deficient number, since it is larger than the sum of its proper divisors (13132556625014).

20346665446666 is a wasteful number, since it uses less digits than its factorization.

20346665446666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67098238.

The product of its (nonzero) digits is 537477120, while the sum is 64.

The spelling of 20346665446666 in words is "twenty trillion, three hundred forty-six billion, six hundred sixty-five million, four hundred forty-six thousand, six hundred sixty-six".