20464064666 has 8 divisors (see below), whose sum is σ = 32030709984. Its totient is φ = 9787161340.

The previous prime is 20464064659. The next prime is 20464064671. The reversal of 20464064666 is 66646046402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222435440 + ... + 222435531.

It is an arithmetic number, because the mean of its divisors is an integer number (4003838748).

Almost surely, 2^20464064666 is an apocalyptic number.

20464064666 is a deficient number, since it is larger than the sum of its proper divisors (11566645318).

20464064666 is a wasteful number, since it uses less digits than its factorization.

20464064666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444870996.

The product of its (nonzero) digits is 995328, while the sum is 44.

The spelling of 20464064666 in words is "twenty billion, four hundred sixty-four million, sixty-four thousand, six hundred sixty-six".