64642442666466 has 32 divisors (see below), whose sum is σ = 148303426642560. Its totient is φ = 18400610336256.

The previous prime is 64642442666441. The next prime is 64642442666479. The reversal of 64642442666466 is 66466624424646.

It is a junction number, because it is equal to n+sod(n) for n = 64642442666397 and 64642442666406.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2860780111 + ... + 2860802706.

It is an arithmetic number, because the mean of its divisors is an integer number (4634482082580).

Almost surely, 2^{64642442666466} is an apocalyptic number.

64642442666466 is an abundant number, since it is smaller than the sum of its proper divisors (83660983976094).

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

64642442666466 is a wasteful number, since it uses less digits than its factorization.

64642442666466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5721583098.

The product of its digits is 1146617856, while the sum is 66.

The spelling of 64642442666466 in words is "sixty-four trillion, six hundred forty-two billion, four hundred forty-two million, six hundred sixty-six thousand, four hundred sixty-six".