1662668408026 has 8 divisors (see below), whose sum is σ = 2528167031604. Its totient is φ = 819946064160.

The previous prime is 1662668407999. The next prime is 1662668408081. The reversal of 1662668408026 is 6208048662661.

It is a Cunningham number, because it is equal to 1289445²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 1662668408025 + 1 = 1289445^2 + 1^2 .

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, 5694069745 + ... + 5694070036.

Almost surely, 2^{1662668408026} is an apocalyptic number.

1662668408026 is a deficient number, since it is larger than the sum of its proper divisors (865498623578).

1662668408026 is a wasteful number, since it uses less digits than its factorization.

1662668408026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11388139856.

The product of its (nonzero) digits is 7962624, while the sum is 55.

The spelling of 1662668408026 in words is "one trillion, six hundred sixty-two billion, six hundred sixty-eight million, four hundred eight thousand, twenty-six".