1665054487 has 2 divisors, whose sum is σ = 1665054488. Its totient is φ = 1665054486.

The previous prime is 1665054473. The next prime is 1665054491. The reversal of 1665054487 is 7844505661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1665054487 - 2⁷ = 1665054359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1665054407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 832527243 + 832527244.

It is an arithmetic number, because the mean of its divisors is an integer number (832527244).

Almost surely, 2^1665054487 is an apocalyptic number.

1665054487 is a deficient number, since it is larger than the sum of its proper divisors (1).

1665054487 is an equidigital number, since it uses as much as digits as its factorization.

1665054487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 806400, while the sum is 46.

The square root of 1665054487 is about 40805.0791813960. The cubic root of 1665054487 is about 1185.2486880955.

The spelling of 1665054487 in words is "one billion, six hundred sixty-five million, fifty-four thousand, four hundred eighty-seven".