1662223457 has 2 divisors, whose sum is σ = 1662223458. Its totient is φ = 1662223456.

The previous prime is 1662223429. The next prime is 1662223463. The reversal of 1662223457 is 7543222661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1573788241 + 88435216 = 39671^2 + 9404^2 .

It is a cyclic number.

It is not a de Polignac number, because 1662223457 - 2⁶ = 1662223393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1662223457.

It is not a weakly prime, because it can be changed into another prime (1662223657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831111728 + 831111729.

It is an arithmetic number, because the mean of its divisors is an integer number (831111729).

Almost surely, 2^1662223457 is an apocalyptic number.

It is an amenable number.

1662223457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1662223457 is an equidigital number, since it uses as much as digits as its factorization.

1662223457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 38.

The square root of 1662223457 is about 40770.3747468674. The cubic root of 1662223457 is about 1184.5765623188.

The spelling of 1662223457 in words is "one billion, six hundred sixty-two million, two hundred twenty-three thousand, four hundred fifty-seven".