20442662662666 has 16 divisors (see below), whose sum is σ = 30830714879328. Its totient is φ = 10165875570000.

The previous prime is 20442662662621. The next prime is 20442662662687. The reversal of 20442662662666 is 66626626624402.

It is a self number, because there is not a number n which added to its sum of digits gives 20442662662666.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29119425 + ... + 29813188.

It is an arithmetic number, because the mean of its divisors is an integer number (1926919679958).

Almost surely, 2^{20442662662666} is an apocalyptic number.

20442662662666 is a deficient number, since it is larger than the sum of its proper divisors (10388052216662).

20442662662666 is a wasteful number, since it uses less digits than its factorization.

20442662662666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58933557.

The product of its (nonzero) digits is 71663616, while the sum is 58.

The spelling of 20442662662666 in words is "twenty trillion, four hundred forty-two billion, six hundred sixty-two million, six hundred sixty-two thousand, six hundred sixty-six".