1662912888997 has 2 divisors, whose sum is σ = 1662912888998. Its totient is φ = 1662912888996.

The previous prime is 1662912888937. The next prime is 1662912889009. The reversal of 1662912888997 is 7998882192661.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1559866110916 + 103046778081 = 1248946^2 + 321009^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1662912888997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1662912888937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831456444498 + 831456444499.

It is an arithmetic number, because the mean of its divisors is an integer number (831456444499).

Almost surely, 2^{1662912888997} is an apocalyptic number.

It is an amenable number.

1662912888997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1662912888997 is an equidigital number, since it uses as much as digits as its factorization.

1662912888997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 376233984, while the sum is 76.

The spelling of 1662912888997 in words is "one trillion, six hundred sixty-two billion, nine hundred twelve million, eight hundred eighty-eight thousand, nine hundred ninety-seven".